The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:54259 advisory.

    Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and     portability.

    Security Fix(es):

    * libaom: libaom: heap buffer overflow in AV1 encoder first-pass stats buffer via LAP mode     (CVE-2026-56208)

    * firefox: thunderbird: Site isolation issue in the DOM: Navigation component (CVE-2026-15719)

    * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-15718)

    * firefox: thunderbird: Mitigation bypass in the Enterprise Policies component (CVE-2026-16390)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: cubeb component (CVE-2026-16350)

    * firefox: thunderbird: Information disclosure in the Storage: IndexedDB component (CVE-2026-16391)

    * firefox: thunderbird: Site isolation issue in the Networking: HTTP component (CVE-2026-16375)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-16356)

    * firefox: thunderbird: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-16363)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.13 and Firefox 153 (CVE-2026-16412)

    * firefox: thunderbird: Same-origin policy bypass in the Networking: DNS component (CVE-2026-16381)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-16355)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.38 and Firefox ESR 140.13     (CVE-2026-16361)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-16352)

    * firefox: thunderbird: Incorrect boundary conditions in the JavaScript: WebAssembly component     (CVE-2026-16368)

    * firefox: thunderbird: Mitigation bypass in the PDF Viewer component (CVE-2026-16377)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.38, Firefox ESR 140.13 and Firefox 153     (CVE-2026-16360)

    * firefox: thunderbird: Use-after-free in the WebRTC: Audio/Video component (CVE-2026-16362)

    * firefox: thunderbird: Site isolation issue in the Graphics: WebRender component (CVE-2026-16358)

    * firefox: thunderbird: Site isolation issue in the Networking component (CVE-2026-16387)

    * firefox: thunderbird: Same-origin policy bypass in the DOM: Navigation component (CVE-2026-16349)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-16357)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the DOM: Navigation component     (CVE-2026-16351)

    * firefox: thunderbird: Privilege escalation in the DOM: Navigation component (CVE-2026-16371)

    * firefox: thunderbird: Privilege escalation in the DOM: Content Processes component (CVE-2026-16379)

    * firefox: thunderbird: Information disclosure in the Graphics: ImageLib component (CVE-2026-16354)

    * firefox: thunderbird: Information disclosure in the Framework component in DevTools (CVE-2026-16374)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-16359)

    * firefox: thunderbird: Mitigation bypass in the DOM: Networking component (CVE-2026-16383)

    * firefox: thunderbird: Integer overflow in the JavaScript: WebAssembly component (CVE-2026-16369)

    * firefox: thunderbird: Invalid pointer in the DOM: Bindings (WebIDL) component (CVE-2026-16353)

    * firefox: thunderbird: Privilege escalation in WebExtensions (CVE-2026-16396)

    * firefox: thunderbird: Information disclosure in the Networking: WebSockets component (CVE-2026-16405)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:54248 advisory.

    Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and     portability.

    Security Fix(es):

    * libaom: libaom: heap buffer overflow in AV1 encoder first-pass stats buffer via LAP mode     (CVE-2026-56208)

    * firefox: thunderbird: Site isolation issue in the DOM: Navigation component (CVE-2026-15719)

    * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-15718)

    * firefox: thunderbird: Mitigation bypass in the Enterprise Policies component (CVE-2026-16390)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: cubeb component (CVE-2026-16350)

    * firefox: thunderbird: Information disclosure in the Storage: IndexedDB component (CVE-2026-16391)

    * firefox: thunderbird: Site isolation issue in the Networking: HTTP component (CVE-2026-16375)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-16356)

    * firefox: thunderbird: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-16363)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.13 and Firefox 153 (CVE-2026-16412)

    * firefox: thunderbird: Same-origin policy bypass in the Networking: DNS component (CVE-2026-16381)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-16355)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.38 and Firefox ESR 140.13     (CVE-2026-16361)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-16352)

    * firefox: thunderbird: Incorrect boundary conditions in the JavaScript: WebAssembly component     (CVE-2026-16368)

    * firefox: thunderbird: Mitigation bypass in the PDF Viewer component (CVE-2026-16377)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.38, Firefox ESR 140.13 and Firefox 153     (CVE-2026-16360)

    * firefox: thunderbird: Use-after-free in the WebRTC: Audio/Video component (CVE-2026-16362)

    * firefox: thunderbird: Site isolation issue in the Graphics: WebRender component (CVE-2026-16358)

    * firefox: thunderbird: Site isolation issue in the Networking component (CVE-2026-16387)

    * firefox: thunderbird: Same-origin policy bypass in the DOM: Navigation component (CVE-2026-16349)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-16357)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the DOM: Navigation component     (CVE-2026-16351)

    * firefox: thunderbird: Privilege escalation in the DOM: Navigation component (CVE-2026-16371)

    * firefox: thunderbird: Privilege escalation in the DOM: Content Processes component (CVE-2026-16379)

    * firefox: thunderbird: Information disclosure in the Graphics: ImageLib component (CVE-2026-16354)

    * firefox: thunderbird: Information disclosure in the Framework component in DevTools (CVE-2026-16374)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-16359)

    * firefox: thunderbird: Mitigation bypass in the DOM: Networking component (CVE-2026-16383)

    * firefox: thunderbird: Integer overflow in the JavaScript: WebAssembly component (CVE-2026-16369)

    * firefox: thunderbird: Invalid pointer in the DOM: Bindings (WebIDL) component (CVE-2026-16353)

    * firefox: thunderbird: Privilege escalation in WebExtensions (CVE-2026-16396)

    * firefox: thunderbird: Information disclosure in the Networking: WebSockets component (CVE-2026-16405)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21061-1 advisory.

    This update for libaom fixes the following issues

    - CVE-2026-56208: untrusted encoder configuration inputs can lead to a heap-based buffer overflow and a     process crash       (bsc#1268650).
    - CVE-2026-56209: crafted video frames with specific Y-plane pixel values can lead to an arbitrary memory     write       (bsc#1268651).
    - CVE-2026-56210: missing bounds check on layer_id inputs can lead to an out-of-bounds heap read     (bsc#1268653).
    - CVE-2026-56211: out-of-range spatial/temporal layer selection can lead to remote code execution     (bsc#1268655).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:42875 advisory.

    RPM packages are internal build artifacts and not supported on their own. They are only supported as part     of the Red Hat AI application platform.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of thunderbird installed on the remote host is prior to 140.12.0-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3795 advisory.

    Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 152,     Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12289)

    Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR     140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12290)

    Incorrect boundary conditions in the Web Audio component. This vulnerability was fixed in Firefox 152,     Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12292)

    Sandbox escape in the DOM: Workers component. This vulnerability was fixed in Firefox 152, Firefox ESR     140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12294)

    Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 152, Firefox ESR     140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12295)

    Sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152,     Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12296)

    Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was     fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
    (CVE-2026-12297)

    Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR     140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12298)

    JIT miscompilation in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 152, Firefox     ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12299)

    Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox     152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12304)

    Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR     140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12305)

    Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR     140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12306)

    Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR     140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12307)

    Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR     140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12308)

    Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR     140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12309)

    Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR     140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12310)

    Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR     140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12312)

    Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability     was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12313)

    Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR     140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12314)

    Incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in     Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12324)

    Denial-of-service in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 152,     Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12325)

    Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151.
    Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of     these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 152,     Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12. (CVE-2026-12327)

    Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151     and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with     enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed     in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
    (CVE-2026-12328)

    Memory safety bug fixed in Thunderbird ESR 140.12. This vulnerability was fixed in Firefox ESR 140.12 and     Thunderbird 140.12. (CVE-2026-12329)

    Incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in     Firefox ESR 140.12, Firefox ESR 115.37, and Thunderbird 140.12. (CVE-2026-12330)

    libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse,     XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation.
    Thus, a use-after-free can occur, (CVE-2026-50219)

    libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers     in cases of a policy violation. Thus, a use-after-free can occur (similar to the CVE-2026-50219     situation). (CVE-2026-56131)

    In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold     backing array reallocation is mishandled when there is data-structure sharing across parsers.
    (CVE-2026-56132)

    A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw     in the AV1 encoder's Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around     guard to be bypassed when g_lag_in_frames is set to 1 or higher. This results in a 232-byte out-of-bounds     write on every encoded frame after the second, corrupting adjacent heap objects. An attacker who can     influence encoder configuration in a transcoding service or WebRTC session could exploit this to cause a     denial of service (process crash) or potentially achieve code execution. (CVE-2026-56208)

    A heap-buffer-overflow read vulnerability was found in libaom, the reference AV1 codec implementation. A     missing bounds check in the SVC (Scalable Video Coding) layer ID control function allows setting a     spatial_layer_id exceeding the configured number of layers. This causes an out-of-bounds heap read of     approximately 40,728 bytes when computing a layer context array index. An attacker who can influence SVC     encoder parameters in a network-facing service could exploit this for information disclosure (heap content     leak) or denial of service (segmentation fault from hitting unmapped memory). (CVE-2026-56210)

    A remote code execution vulnerability was found in libaom, the reference AV1 codec implementation.
    Insufficient bounds validation in the AV1 encoder's SVC (Scalable Video Coding) layer ID control allows an     attacker to supply crafted video frame pixels that overlap with internal encoder layer context structures.
    In fork-based video processing services, an attacker can use this to hijack the cyclic refresh map     pointer, brute-force the process base address via a crash oracle, and redirect control flow to achieve     arbitrary command execution. Exploitation requires the target service to use libaom with SVC encoding     enabled and accept attacker-supplied video frames. (CVE-2026-56211)

    libexpat before 2.8.2 has an integer overflow in storeAtts. (CVE-2026-56403)

    libexpat before 2.8.2 has an integer overflow in addBinding. (CVE-2026-56404)

    libexpat before 2.8.2 has an integer overflow in getAttributeId. (CVE-2026-56405)

    libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was     present in XML_Parse. (CVE-2026-56406)

    libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity     textLen. (CVE-2026-56407)

    libexpat before 2.8.2 has an integer overflow in copyString. (CVE-2026-56408)

    libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call     depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-     free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219. (CVE-2026-56412)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:47105 advisory.

    Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and     portability.

    Security Fix(es):

    * libaom: libaom: heap buffer overflow in AV1 encoder first-pass stats buffer via LAP mode     (CVE-2026-56208)

    * firefox: thunderbird: Site isolation issue in the DOM: Navigation component (CVE-2026-15719)

    * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-15718)

    * firefox: thunderbird: Mitigation bypass in the Enterprise Policies component (CVE-2026-16390)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: cubeb component (CVE-2026-16350)

    * firefox: thunderbird: Information disclosure in the Storage: IndexedDB component (CVE-2026-16391)

    * firefox: thunderbird: Site isolation issue in the Networking: HTTP component (CVE-2026-16375)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-16356)

    * firefox: thunderbird: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-16363)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.13 and Firefox 153 (CVE-2026-16412)

    * firefox: thunderbird: Same-origin policy bypass in the Networking: DNS component (CVE-2026-16381)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-16355)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.38 and Firefox ESR 140.13     (CVE-2026-16361)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-16352)

    * firefox: thunderbird: Incorrect boundary conditions in the JavaScript: WebAssembly component     (CVE-2026-16368)

    * firefox: thunderbird: Mitigation bypass in the PDF Viewer component (CVE-2026-16377)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.38, Firefox ESR 140.13 and Firefox 153     (CVE-2026-16360)

    * firefox: thunderbird: Use-after-free in the WebRTC: Audio/Video component (CVE-2026-16362)

    * firefox: thunderbird: Site isolation issue in the Graphics: WebRender component (CVE-2026-16358)

    * firefox: thunderbird: Site isolation issue in the Networking component (CVE-2026-16387)

    * firefox: thunderbird: Same-origin policy bypass in the DOM: Navigation component (CVE-2026-16349)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-16357)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the DOM: Navigation component     (CVE-2026-16351)

    * firefox: thunderbird: Privilege escalation in the DOM: Navigation component (CVE-2026-16371)

    * firefox: thunderbird: Privilege escalation in the DOM: Content Processes component (CVE-2026-16379)

    * firefox: thunderbird: Information disclosure in the Graphics: ImageLib component (CVE-2026-16354)

    * firefox: thunderbird: Information disclosure in the Framework component in DevTools (CVE-2026-16374)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-16359)

    * firefox: thunderbird: Mitigation bypass in the DOM: Networking component (CVE-2026-16383)

    * firefox: thunderbird: Integer overflow in the JavaScript: WebAssembly component (CVE-2026-16369)

    * firefox: thunderbird: Invalid pointer in the DOM: Bindings (WebIDL) component (CVE-2026-16353)

    * firefox: thunderbird: Privilege escalation in WebExtensions (CVE-2026-16396)

    * firefox: thunderbird: Information disclosure in the Networking: WebSockets component (CVE-2026-16405)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:47104 advisory.

    Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and     portability.

    Security Fix(es):

    * libaom: libaom: heap buffer overflow in AV1 encoder first-pass stats buffer via LAP mode     (CVE-2026-56208)

    * firefox: thunderbird: Site isolation issue in the DOM: Navigation component (CVE-2026-15719)

    * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-15718)

    * firefox: thunderbird: Mitigation bypass in the Enterprise Policies component (CVE-2026-16390)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: cubeb component (CVE-2026-16350)

    * firefox: thunderbird: Information disclosure in the Storage: IndexedDB component (CVE-2026-16391)

    * firefox: thunderbird: Site isolation issue in the Networking: HTTP component (CVE-2026-16375)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-16356)

    * firefox: thunderbird: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-16363)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.13 and Firefox 153 (CVE-2026-16412)

    * firefox: thunderbird: Same-origin policy bypass in the Networking: DNS component (CVE-2026-16381)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-16355)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.38 and Firefox ESR 140.13     (CVE-2026-16361)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-16352)

    * firefox: thunderbird: Incorrect boundary conditions in the JavaScript: WebAssembly component     (CVE-2026-16368)

    * firefox: thunderbird: Mitigation bypass in the PDF Viewer component (CVE-2026-16377)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.38, Firefox ESR 140.13 and Firefox 153     (CVE-2026-16360)

    * firefox: thunderbird: Use-after-free in the WebRTC: Audio/Video component (CVE-2026-16362)

    * firefox: thunderbird: Site isolation issue in the Graphics: WebRender component (CVE-2026-16358)

    * firefox: thunderbird: Site isolation issue in the Networking component (CVE-2026-16387)

    * firefox: thunderbird: Same-origin policy bypass in the DOM: Navigation component (CVE-2026-16349)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-16357)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the DOM: Navigation component     (CVE-2026-16351)

    * firefox: thunderbird: Privilege escalation in the DOM: Navigation component (CVE-2026-16371)

    * firefox: thunderbird: Privilege escalation in the DOM: Content Processes component (CVE-2026-16379)

    * firefox: thunderbird: Information disclosure in the Graphics: ImageLib component (CVE-2026-16354)

    * firefox: thunderbird: Information disclosure in the Framework component in DevTools (CVE-2026-16374)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-16359)

    * firefox: thunderbird: Mitigation bypass in the DOM: Networking component (CVE-2026-16383)

    * firefox: thunderbird: Integer overflow in the JavaScript: WebAssembly component (CVE-2026-16369)

    * firefox: thunderbird: Invalid pointer in the DOM: Bindings (WebIDL) component (CVE-2026-16353)

    * firefox: thunderbird: Privilege escalation in WebExtensions (CVE-2026-16396)

    * firefox: thunderbird: Information disclosure in the Networking: WebSockets component (CVE-2026-16405)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0820 advisory.

    Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

    CVE-2026-15718:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    We are aware that exploit code for this is public however we are not aware of any attacks in the wild     abusing this flaw.

    CVE-2026-15719:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    We are aware that exploit code for this is public however we are not aware of any attacks in the wild     abusing this flaw.

    CVE-2026-16349:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Same-origin policy bypass in the DOM: Navigation component

    CVE-2026-16350:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Incorrect boundary conditions in the Audio/Video: cubeb component

    CVE-2026-16351:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Sandbox escape due to use-after-free in the DOM: Navigation component

    CVE-2026-16352:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Sandbox escape due to use-after-free in the Disability Access APIs component

    CVE-2026-16353:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Invalid pointer in the DOM: Bindings (WebIDL) component

    CVE-2026-16354:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Information disclosure in the Graphics: ImageLib component

    CVE-2026-16355:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    JIT miscompilation in the JavaScript Engine: JIT component

    CVE-2026-16356:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Sandbox escape due to use-after-free in the Disability Access APIs component

    CVE-2026-16357:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Incorrect boundary conditions in the Graphics component

    CVE-2026-16358:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Site isolation issue in the Graphics: WebRender component

    CVE-2026-16359:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Incorrect boundary conditions in the Audio/Video: GMP component

    CVE-2026-16360:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Memory safety bugs present in Thunderbird ESR 140.12 and Thunderbird 152. Some of these bugs showed     evidence of memory corruption and we presume that with enough effort some of these could have been     exploited to run arbitrary code.

    CVE-2026-16361:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Memory safety bugs present in Thunderbird ESR 140.12. Some of these bugs showed evidence of memory     corruption and we presume that with enough effort some of these could have been exploited to run arbitrary     code.

    CVE-2026-16362:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Use-after-free in the WebRTC: Audio/Video component

    CVE-2026-16363:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    JIT miscompilation in the JavaScript: WebAssembly component

    CVE-2026-16368:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Incorrect boundary conditions in the JavaScript: WebAssembly component

    CVE-2026-16369:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Integer overflow in the JavaScript: WebAssembly component

    CVE-2026-16371:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Privilege escalation in the DOM: Navigation component

    CVE-2026-16374:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Information disclosure in the Framework component in DevTools

    CVE-2026-16375:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Site isolation issue in the Networking: HTTP component

    CVE-2026-16377:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Mitigation bypass in the PDF Viewer component

    CVE-2026-16379:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Privilege escalation in the DOM: Content Processes component

    CVE-2026-16381:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Same-origin policy bypass in the Networking: DNS component

    CVE-2026-16383:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Mitigation bypass in the DOM: Networking component

    CVE-2026-16387:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Site isolation issue in the Networking component

    CVE-2026-16390:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Mitigation bypass in the Enterprise Policies component

    CVE-2026-16391:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Information disclosure in the Storage: IndexedDB component

    CVE-2026-16396:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Privilege escalation in WebExtensions

    CVE-2026-16405:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Information disclosure in the Networking: WebSockets component

    CVE-2026-16412:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the     following issue:
    Memory safety bugs present in Thunderbird ESR 140.12 and Thunderbird 152. Some of these bugs showed     evidence of memory corruption and we presume that with enough effort some of these could have been     exploited to run arbitrary code.

    CVE-2026-56208:
    A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw     in the AV1 encoder's Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around     guard to be bypassed when g_lag_in_frames is set to 1 or higher. This results in a 232-byte out-of-bounds     write on every encoded frame after the second, corrupting adjacent heap objects. An attacker who can     influence encoder configuration in a transcoding service or WebRTC session could exploit this to cause a     denial of service (process crash) or potentially achieve code execution.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:54249 advisory.

    Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and     portability.

    Security Fix(es):

    * libaom: libaom: heap buffer overflow in AV1 encoder first-pass stats buffer via LAP mode     (CVE-2026-56208)

    * firefox: thunderbird: Site isolation issue in the DOM: Navigation component (CVE-2026-15719)

    * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-15718)

    * firefox: thunderbird: Mitigation bypass in the Enterprise Policies component (CVE-2026-16390)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: cubeb component (CVE-2026-16350)

    * firefox: thunderbird: Information disclosure in the Storage: IndexedDB component (CVE-2026-16391)

    * firefox: thunderbird: Site isolation issue in the Networking: HTTP component (CVE-2026-16375)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-16356)

    * firefox: thunderbird: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-16363)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.13 and Firefox 153 (CVE-2026-16412)

    * firefox: thunderbird: Same-origin policy bypass in the Networking: DNS component (CVE-2026-16381)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-16355)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.38 and Firefox ESR 140.13     (CVE-2026-16361)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-16352)

    * firefox: thunderbird: Incorrect boundary conditions in the JavaScript: WebAssembly component     (CVE-2026-16368)

    * firefox: thunderbird: Mitigation bypass in the PDF Viewer component (CVE-2026-16377)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.38, Firefox ESR 140.13 and Firefox 153     (CVE-2026-16360)

    * firefox: thunderbird: Use-after-free in the WebRTC: Audio/Video component (CVE-2026-16362)

    * firefox: thunderbird: Site isolation issue in the Graphics: WebRender component (CVE-2026-16358)

    * firefox: thunderbird: Site isolation issue in the Networking component (CVE-2026-16387)

    * firefox: thunderbird: Same-origin policy bypass in the DOM: Navigation component (CVE-2026-16349)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-16357)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the DOM: Navigation component     (CVE-2026-16351)

    * firefox: thunderbird: Privilege escalation in the DOM: Navigation component (CVE-2026-16371)

    * firefox: thunderbird: Privilege escalation in the DOM: Content Processes component (CVE-2026-16379)

    * firefox: thunderbird: Information disclosure in the Graphics: ImageLib component (CVE-2026-16354)

    * firefox: thunderbird: Information disclosure in the Framework component in DevTools (CVE-2026-16374)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-16359)

    * firefox: thunderbird: Mitigation bypass in the DOM: Networking component (CVE-2026-16383)

    * firefox: thunderbird: Integer overflow in the JavaScript: WebAssembly component (CVE-2026-16369)

    * firefox: thunderbird: Invalid pointer in the DOM: Bindings (WebIDL) component (CVE-2026-16353)

    * firefox: thunderbird: Privilege escalation in WebExtensions (CVE-2026-16396)

    * firefox: thunderbird: Information disclosure in the Networking: WebSockets component (CVE-2026-16405)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6411 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6411-1                   security@debian.org     https://www.debian.org/security/                                  Aron Xu     August 05, 2026                       https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : aom     CVE ID         : CVE-2026-56208 CVE-2026-56209 CVE-2026-56210 CVE-2026-56211     Debian Bug     : 1140428

    Multiple vulnerabilities were discovered in aom, the reference     implementation of the AV1 video codec. All of them affect the encoder;
    applications that only decode AV1 video are not affected.

    CVE-2026-56208

        In look-ahead processing (LAP) mode the first-pass statistics buffer         was sized from the configured lag-in-frames alone, leaving it shorter         than the longest group of pictures the encoder may analyse. Together         with an off-by-one in the number of frames considered, this allowed         the encoder to read and write outside the allocation, resulting in         denial of service or potentially the execution of arbitrary code.

    CVE-2026-56209, CVE-2026-56210, CVE-2026-56211

        The AOME_SET_SPATIAL_LAYER_ID and AV1E_SET_SVC_LAYER_ID codec         controls did not validate the supplied scalable video coding (SVC)         layer identifiers against the number of layers actually configured.
        A negative or too large identifier led to an out-of-bounds read of         the layer context array, an out-of-bounds write through the cyclic         refresh map pointer, and potentially the execution of arbitrary         code. Exploitation requires an application that allows an attacker         to influence the encoder's SVC configuration.

    Additionally this update validates the configured number of spatial and     temporal layers, which the affected version accepted without any range     check.

    For the stable distribution (trixie), these problems have been fixed in     version 3.12.1-1+deb13u1.

    We recommend that you upgrade your aom packages.

    For the detailed security status of aom please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/aom

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
334958	RHEL 8 : firefox (RHSA-2026:54259)	Nessus	Red Hat Local Security Checks	2026/8/12	2026/8/12	critical
334960	RHEL 7 : firefox (RHSA-2026:54248)	Nessus	Red Hat Local Security Checks	2026/8/12	2026/8/12	critical
324060	openSUSE 16 Security Update : libaom (openSUSE-SU-2026:21061-1)	Nessus	SuSE Local Security Checks	2026/7/1	2026/7/1	high
328800	RHEL 9 : RHEL AI 3.5 RPM runtime CVE fix - aom (Important) (RHSA-2026:42875)	Nessus	Red Hat Local Security Checks	2026/7/21	2026/7/21	high
325578	Amazon Linux 2 : thunderbird, --advisory ALAS2-2026-3795 (ALAS-2026-3795)	Nessus	Amazon Linux Local Security Checks	2026/7/8	2026/7/8	medium
330443	RHEL 8 : firefox (RHSA-2026:47105)	Nessus	Red Hat Local Security Checks	2026/7/28	2026/7/31	critical
331715	RHEL 9 : firefox (RHSA-2026:47104)	Nessus	Red Hat Local Security Checks	2026/8/3	2026/8/6	critical
333135	TencentOS Server 3: firefox (TSSA-2026:0820)	Nessus	Tencent Local Security Checks	2026/8/6	2026/8/6	critical
334919	RHEL 9 : firefox (RHSA-2026:54249)	Nessus	Red Hat Local Security Checks	2026/8/12	2026/8/12	critical
332088	Debian dsa-6411 : aom-tools - security update	Nessus	Debian Local Security Checks	2026/8/5	2026/8/5	high

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