The version of Thunderbird installed on the remote Windows host is prior to 153.3. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-96 advisory.

  - A maliciously constructed mail header could lead to multiple fields being parsed as one, or potential     memory safety violations. (CVE-2026-92238)

  - A maliciously constructed IMAP line could cause an out-of-bounds buffer read. (CVE-2026-92239)

  - A malicious or compromised IMAP server can trigger an out-of-bounds read in the IMAP response parser by     sending an untagged ' ID' response, crashing Thunderbird. The affected parsing path is reachable before     authentication. (CVE-2026-92240)

  - Use-after-free in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 156,     Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
    (CVE-2026-92005)

  - Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This     vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3,     Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3. (CVE-2026-92006, CVE-2026-92007,     CVE-2026-92008, CVE-2026-92009, CVE-2026-92010, CVE-2026-92011, CVE-2026-92012, CVE-2026-92013)

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 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4781 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4781-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/               Emilio Pozuelo Monfort     September 17, 2026                            https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : firefox-esr     Version        : 140.16.0esr-1~deb12u1     CVE ID         : CVE-2026-92005 CVE-2026-92006 CVE-2026-92007 CVE-2026-92008                      CVE-2026-92009 CVE-2026-92010 CVE-2026-92011 CVE-2026-92012                      CVE-2026-92013 CVE-2026-92014 CVE-2026-92015 CVE-2026-92016                      CVE-2026-92017 CVE-2026-92018 CVE-2026-92019 CVE-2026-92020                      CVE-2026-92021 CVE-2026-92022 CVE-2026-92023 CVE-2026-92024                      CVE-2026-92025 CVE-2026-92026 CVE-2026-92027 CVE-2026-92028                      CVE-2026-92029 CVE-2026-92030 CVE-2026-92031 CVE-2026-92032

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

    For Debian 12 bookworm, these problems have been fixed in version     140.16.0esr-1~deb12u1.

    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 Oracle Linux 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2026-69461 advisory.

    [140.16.0-1.0.1]
    - Fix firefox-oracle-default-prefs.js for new nss [Orabug: 37079773]
    - Add firefox-oracle-default-prefs.js and remove the corresponding Red Hat file

    [140.16.0-1]
    - Update to 140.16.0 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This     vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3,     Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3. (CVE-2026-92008)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:71652 advisory.

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

    Security Fix(es):

    * firefox: thunderbird: Use-after-free in the SVG component (CVE-2026-92024)

    * firefox: thunderbird: Mitigation bypass in the Remote Settings Client component (CVE-2026-92019)

    * firefox: thunderbird: Use-after-free in the Networking component (CVE-2026-92026)

    * firefox: thunderbird: Information disclosure in the Graphics: ImageLib component (CVE-2026-92031)

    * firefox: thunderbird: Sandbox escape due to invalid pointer in the Graphics component (CVE-2026-92032)

    * firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
    CanvasWebGL component (CVE-2026-92010)

    * firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
    CanvasWebGL component (CVE-2026-92006)

    * firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
    CanvasWebGL component (CVE-2026-92011)

    * firefox: thunderbird: Use-after-free in the DOM: Streams component (CVE-2026-92027)

    * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-92028)

    * firefox: thunderbird: Privilege escalation in the WebExtensions component (CVE-2026-92015)

    * firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
    CanvasWebGL component (CVE-2026-92013)

    * firefox: thunderbird: Use-after-free in the Disability Access APIs component (CVE-2026-92016)

    * firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
    CanvasWebGL component (CVE-2026-92012)

    * firefox: thunderbird: Use-after-free in the DOM: HTML Parser component (CVE-2026-92022)

    * firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics     component (CVE-2026-92014)

    * firefox: thunderbird: Sandbox escape in the DOM: Core & HTML component (CVE-2026-92018)

    * firefox: thunderbird: Use-after-free in the JavaScript Engine: JIT component (CVE-2026-92021)

    * firefox: thunderbird: Use-after-free in the Audio/Video: Web Codecs component (CVE-2026-92005)

    * firefox: thunderbird: Privilege escalation in the DOM: Service Workers component (CVE-2026-92017)

    * firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
    CanvasWebGL component (CVE-2026-92009)

    * firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
    WebRender component (CVE-2026-92020)

    * firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
    CanvasWebGL component (CVE-2026-92008)

    * firefox: thunderbird: Mitigation bypass in the DOM: Copy & Paste and Drag & Drop component     (CVE-2026-92030)

    * firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
    CanvasWebGL component (CVE-2026-92007)

    * firefox: thunderbird: Use-after-free in the DOM: Navigation component (CVE-2026-92025)

    * firefox: thunderbird: Use-after-free in the SVG component (CVE-2026-92029)

    * firefox: thunderbird: Use-after-free in the XML component (CVE-2026-92023)

    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 Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-150967 advisory.

    Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This     vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3,     Thunderbird 156, and Thunderbird 140.16.

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

Note that Nessus has not tested for this issue 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
346320	Mozilla Thunderbird < 153.3	Nessus	Windows	2026/9/16	2026/10/21	critical
346859	Debian dla-4781 : firefox-esr - security update	Nessus	Debian Local Security Checks	2026/9/17	2026/9/22	critical
349134	Oracle Linux 10 : firefox (ELSA-2026-69461)	Nessus	Oracle Linux Local Security Checks	2026/9/23	2026/9/23	critical
349212	Linux Distros Unpatched Vulnerability : CVE-2026-92008	Nessus	Misc.	2026/9/23	2026/10/15	high
349912	RHEL 8 : firefox (RHSA-2026:71652)	Nessus	Red Hat Local Security Checks	2026/9/24	2026/9/25	critical
377838	Unity Linux 20.1070e Security Update: firefox (UTSA-2026-150967)	Nessus	Unity Linux Local Security Checks	2026/11/9	2026/11/9	high
365293	Amazon Linux 2 : firefox (ALASFIREFOX-2026-066)	Nessus	Amazon Linux Local Security Checks	2026/10/12	2026/10/29	high

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