The version of Thunderbird installed on the remote Windows host is prior to 140.10. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-34 advisory.

  - Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150, Firefox ESR     140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6771)

  - Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR     115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6746)

  - Use-after-free in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10,     Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6747)

  - Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox     150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6748, CVE-2026-6751)

  - Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability     was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
    (CVE-2026-6749)

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

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-10757 advisory.

    [140.10.0-1.0.1]
    - Fix firefox-oracle-default-prefs.js for new nss [Orabug: 37079773]
    - Add firefox-oracle-default-prefs.js and remove the corresponding Red Hat file

    [140.10.0]
    - Add debranding patches (Mustafa Gezen)
    - Add OpenELA default preferences (Louis Abel)

    [140.10.0-1]
    - Update to 140.10.0 ESR

Tenable has extracted the preceding description block directly from the Oracle 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-2026:20621-1 advisory.

    Update to Firefox Extended Support Release 140.10.0 ESR.

    - MFSA 2026-32 (bsc#1262230):
     * CVE-2026-6746: Use-after-free in the DOM: Core & HTML component
     * CVE-2026-6747: Use-after-free in the WebRTC component
     * CVE-2026-6748: Uninitialized memory in the Audio/Video: Web Codecs component
     * CVE-2026-6749: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component
     * CVE-2026-6750: Privilege escalation in the Graphics: WebRender component
     * CVE-2026-6751: Uninitialized memory in the Audio/Video: Web Codecs component
     * CVE-2026-6752: Incorrect boundary conditions in the WebRTC component
     * CVE-2026-6753: Incorrect boundary conditions in the WebRTC component
     * CVE-2026-6754: Use-after-free in the JavaScript Engine component
     * CVE-2026-6757: Invalid pointer in the JavaScript: WebAssembly component
     * CVE-2026-6759: Use-after-free in the Widget: Cocoa component
     * CVE-2026-6761: Privilege escalation in the Networking component
     * CVE-2026-6762: Spoofing issue in the DOM: Core & HTML component
     * CVE-2026-6763: Mitigation bypass in the File Handling component
     * CVE-2026-6764: Incorrect boundary conditions in the DOM: Device Interfaces component
     * CVE-2026-6765: Information disclosure in the Form Autofill component
     * CVE-2026-6766: Incorrect boundary conditions in the Libraries component in NSS
     * CVE-2026-6767: Other issue in the Libraries component in NSS
     * CVE-2026-6769: Privilege escalation in the Debugger component
     * CVE-2026-6770: Other issue in the Storage: IndexedDB component
     * CVE-2026-6771: Mitigation bypass in the DOM: Security component
     * CVE-2026-6772: Incorrect boundary conditions in the Libraries component in NSS
     * CVE-2026-6776: Incorrect boundary conditions in the WebRTC: Networking component
     * CVE-2026-6785: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR     140.10, Firefox        150 and Thunderbird 150
     * CVE-2026-6786: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and     Thunderbird        150

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 SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1650-1 advisory.

    This update for MozillaFirefox fixes the following issue:

    Update to Firefox Extended Support Release 140.10.0 ESR (bsc#1262230, MFSA 2026-32):

    - CVE-2026-6746: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-6747: Use-after-free in the WebRTC component.
    - CVE-2026-6748: Uninitialized memory in the Audio/Video: Web Codecs component.
    - CVE-2026-6749: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component.
    - CVE-2026-6750: Privilege escalation in the Graphics: WebRender component.
    - CVE-2026-6751: Uninitialized memory in the Audio/Video: Web Codecs component.
    - CVE-2026-6752: Incorrect boundary conditions in the WebRTC component.
    - CVE-2026-6753: Incorrect boundary conditions in the WebRTC component.
    - CVE-2026-6754: Use-after-free in the JavaScript Engine component.
    - CVE-2026-6757: Invalid pointer in the JavaScript: WebAssembly component.
    - CVE-2026-6759: Use-after-free in the Widget: Cocoa component.
    - CVE-2026-6761: Privilege escalation in the Networking component.
    - CVE-2026-6762: Spoofing issue in the DOM: Core & HTML component.
    - CVE-2026-6763: Mitigation bypass in the File Handling component.
    - CVE-2026-6764: Incorrect boundary conditions in the DOM: Device Interfaces component.
    - CVE-2026-6765: Information disclosure in the Form Autofill component.
    - CVE-2026-6766: Incorrect boundary conditions in the Libraries component in NSS.
    - CVE-2026-6767: Other issue in the Libraries component in NSS.
    - CVE-2026-6769: Privilege escalation in the Debugger component.
    - CVE-2026-6770: Other issue in the Storage: IndexedDB component.
    - CVE-2026-6771: Mitigation bypass in the DOM: Security component.
    - CVE-2026-6772: Incorrect boundary conditions in the Libraries component in NSS.
    - CVE-2026-6776: Incorrect boundary conditions in the WebRTC: Networking component.
    - CVE-2026-6785: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR     140.10, Firefox 150       and Thunderbird 150.
    - CVE-2026-6786: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and     Thunderbird       150.

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 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:13537 advisory.

    Mozilla Thunderbird is a standalone mail and newsgroup client.

    Security Fix(es):

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

    * firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

    * firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

    * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

    * firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox     150 and Thunderbird 150 (CVE-2026-6786)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

    * firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

    * firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D     component (CVE-2026-6749)

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

    * firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

    * firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

    * firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird     ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

    * firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

    * firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component     (CVE-2026-6764)

    * firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

    * firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

    * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

    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 RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:13537 advisory.

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

    * firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

    * firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

    * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

    * firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox     150 and Thunderbird 150 (CVE-2026-6786)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

    * firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

    * firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D     component (CVE-2026-6749)

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

    * firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

    * firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

    * firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird     ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

    * firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

    * firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component     (CVE-2026-6764)

    * firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

    * firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

    * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

Tenable has extracted the preceding description block directly from the RockyLinux 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 RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:12285 advisory.

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

    * firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

    * firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

    * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

    * firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox     150 and Thunderbird 150 (CVE-2026-6786)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

    * firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

    * firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D     component (CVE-2026-6749)

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

    * firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

    * firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

    * firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird     ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

    * firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

    * firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component     (CVE-2026-6764)

    * firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

    * firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

    * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

Tenable has extracted the preceding description block directly from the RockyLinux 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 MiracleLinux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the AXSA:2026-579:10 advisory.

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)
      * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)
      * firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)
      * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)
      * firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)
      * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)
      * firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)
      * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox     150 and Thunderbird 150 (CVE-2026-6786)
      * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)
      * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)
      * firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)
      * firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D     component (CVE-2026-6749)
      * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)
      * firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)
      * firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)
      * firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)
      * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)
      * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird     ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)
      * firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)
      * firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component     (CVE-2026-6764)
      * firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)
      * firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)
      * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)
      * firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component     (CVE-2026-6776)
      * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

Tenable has extracted the preceding description block directly from the MiracleLinux 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 Firefox ESR installed on the remote macOS or Mac OS X host is prior to 140.10. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-32 advisory.

  - Memory safety bugs present in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149.
    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-2026-6786)

  - Memory safety bugs present in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149     and Thunderbird 149. 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-2026-6785)

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 Firefox installed on the remote macOS or Mac OS X host is prior to 150.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-30 advisory.

  - Incorrect boundary conditions, integer overflow in the Audio/Video: Playback component. This vulnerability     was fixed in Firefox 150 and Thunderbird 150. (CVE-2026-6783)

  - Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR     115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6746)

  - Use-after-free in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10,     Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6747)

  - Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox     150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6748, CVE-2026-6751)

  - Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability     was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
    (CVE-2026-6749)

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 macOS or Mac OS X host is prior to 150.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-33 advisory.

  - Incorrect boundary conditions, integer overflow in the Audio/Video: Playback component. This vulnerability     was fixed in Firefox 150 and Thunderbird 150. (CVE-2026-6783)

  - Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR     115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6746)

  - Use-after-free in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10,     Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6747)

  - Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox     150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6748, CVE-2026-6751)

  - Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability     was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
    (CVE-2026-6749)

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

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:10757 advisory.

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

    * firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

    * firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

    * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

    * firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox     150 and Thunderbird 150 (CVE-2026-6786)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

    * firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

    * firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D     component (CVE-2026-6749)

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

    * firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

    * firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

    * firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird     ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

    * firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

    * firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component     (CVE-2026-6764)

    * firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

    * firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

    * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

Tenable has extracted the preceding description block directly from the RockyLinux 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 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4546 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4546-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/               Emilio Pozuelo Monfort     April 23, 2026                                https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : firefox-esr     Version        : 140.10.0esr-1~deb11u1     CVE ID         : CVE-2026-6746 CVE-2026-6747 CVE-2026-6748 CVE-2026-6749                      CVE-2026-6750 CVE-2026-6751 CVE-2026-6752 CVE-2026-6753                      CVE-2026-6754 CVE-2026-6757 CVE-2026-6761 CVE-2026-6762                      CVE-2026-6763 CVE-2026-6764 CVE-2026-6765 CVE-2026-6766                      CVE-2026-6767 CVE-2026-6769 CVE-2026-6770 CVE-2026-6771                      CVE-2026-6772 CVE-2026-6776 CVE-2026-6785 CVE-2026-6786

    Multiple security issues have been found in the Mozilla Firefox web     browser, which could potentially result in the execution of arbitrary     code, spoofing, information disclosure or privilege escalation.

    For Debian 11 bullseye, these problems have been fixed in version     140.10.0esr-1~deb11u1.

    We recommend that you upgrade your firefox-esr packages.

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

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

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.

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:10766 advisory.

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

    Security Fix(es):

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

    * firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

    * firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

    * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

    * firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox     150 and Thunderbird 150 (CVE-2026-6786)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

    * firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

    * firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D     component (CVE-2026-6749)

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

    * firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

    * firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

    * firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird     ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

    * firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

    * firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component     (CVE-2026-6764)

    * firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

    * firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

    * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

    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.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
309099	Mozilla Thunderbird < 140.10	Nessus	Windows	2026/4/21	2026/5/1	critical
310655	Oracle Linux 9 : firefox (ELSA-2026-10757)	Nessus	Oracle Linux Local Security Checks	2026/4/28	2026/5/8	critical
310666	openSUSE 16 Security Update : MozillaFirefox (openSUSE-SU-2026:20621-1)	Nessus	SuSE Local Security Checks	2026/4/28	2026/4/30	critical
311753	SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2026:1650-1)	Nessus	SuSE Local Security Checks	2026/5/2	2026/5/2	critical
312102	RHEL 8 : thunderbird (RHSA-2026:13537)	Nessus	Red Hat Local Security Checks	2026/5/4	2026/5/4	critical
313015	RockyLinux 8 : thunderbird (RLSA-2026:13537)	Nessus	Rocky Linux Local Security Checks	2026/5/7	2026/5/7	critical
313036	RockyLinux 10 : thunderbird (RLSA-2026:12285)	Nessus	Rocky Linux Local Security Checks	2026/5/7	2026/5/7	critical
314150	MiracleLinux 8 : thunderbird-140.10.0-1.el8_10.ML.1 (AXSA:2026-579:10)	Nessus	Miracle Linux Local Security Checks	2026/5/11	2026/5/11	critical
307897	Mozilla Firefox ESR < 140.10	Nessus	MacOS X Local Security Checks	2026/4/21	2026/5/1	critical
307895	Mozilla Firefox < 150.0	Nessus	MacOS X Local Security Checks	2026/4/21	2026/5/8	medium
309098	Mozilla Thunderbird < 150.0	Nessus	MacOS X Local Security Checks	2026/4/21	2026/5/7	medium
310712	RockyLinux 9 : firefox (RLSA-2026:10757)	Nessus	Rocky Linux Local Security Checks	2026/4/28	2026/4/30	critical
309901	Debian dla-4546 : firefox-esr - security update	Nessus	Debian Local Security Checks	2026/4/23	2026/5/1	critical
310549	RHEL 8 : firefox (RHSA-2026:10766)	Nessus	Red Hat Local Security Checks	2026/4/27	2026/4/30	critical

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