When requesting an OpenPGP key from a WKD server, an incorrect padding size was used and a network observer could have learned the length of the requested email address. This vulnerability affects Thunderbird < 136 and Thunderbird < 128.8.

vendor_unpatched cve-2025-26695: Unpatched CVEs for Debian Linux (cve-2025-26695)

The version of thunderbird installed on the remote host is prior to 128.8.1-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2025-2807 advisory.

    Requests initiated through reader mode did not properly omit cookies with a SameSite attribute. This     vulnerability affects Thunderbird < 91.9, Firefox ESR < 91.9, and Firefox < 100. (CVE-2022-29912)

    The parent process would not properly check whether the Speech Synthesis feature is enabled, when     receiving instructions from a child process. This vulnerability affects Thunderbird < 91.9.
    (CVE-2022-29913)

    In resizeToAtLeast of SkRegion.cpp, there is a possible out of bounds write due to an integer overflow.
    This could lead to local escalation of privilege with no additional execution privileges needed. User     interaction is not needed for exploitation. (CVE-2024-43097)

    It was possible to cause a use-after-free in the content process side of a WebTransport connection,     leading to a potentially exploitable crash. This vulnerability affects Firefox < 136, Firefox ESR <     115.21, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8. (CVE-2025-1931)

    An inconsistent comparator in xslt/txNodeSorter could have resulted in potentially exploitable out-of-     bounds access. Only affected version 122 and later. This vulnerability affects Firefox < 136, Firefox ESR     < 128.8, Thunderbird < 136, and Thunderbird < 128.8. (CVE-2025-1932)

    On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory.
    This can potentially cause them to be treated as a different type. This vulnerability affects Firefox <     136, Firefox ESR < 115.21, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.
    (CVE-2025-1933)

    It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially     triggering garbage collection when the engine was not expecting it. This vulnerability affects Firefox <     136, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8. (CVE-2025-1934)

    A web page could trick a user into setting that site as the default handler for a custom URL protocol.
    This vulnerability affects Firefox < 136, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.
    (CVE-2025-1935)

    jar: URLs retrieve local file content packaged in a ZIP archive. The null and everything after it was     ignored when retrieving the content from the archive, but the fake extension after the null was used to     determine the type of content. This could have been used to hide code in a web extension disguised as     something else like an image. This vulnerability affects Firefox < 136, Firefox ESR < 128.8, Thunderbird <     136, and Thunderbird < 128.8. (CVE-2025-1936)

    Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, and     Thunderbird 128.7. 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 affects Firefox <     136, Firefox ESR < 115.21, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.
    (CVE-2025-1937)

    Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. 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 affects Firefox < 136, Firefox ESR <     128.8, Thunderbird < 136, and Thunderbird < 128.8. (CVE-2025-1938)

    When requesting an OpenPGP key from a WKD server, an incorrect padding size was used and a network     observer could have learned the length of the requested email address. This vulnerability affects     Thunderbird < 136 and Thunderbird < 128.8. (CVE-2025-26695)

    Certain crafted MIME email messages that claimed to contain an encrypted OpenPGP message, which instead     contained an OpenPGP signed message, were wrongly shown as being encrypted. This vulnerability affects     Thunderbird < 136 and Thunderbird < 128.8. (CVE-2025-26696)

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 Fedora 40 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-4b50cd66a5 advisory.

    Update to 128.8.0

    * https://www.mozilla.org/en-US/security/advisories/mfsa2025-18/
    * https://www.thunderbird.net/en-US/thunderbird/128.8.0esr/releasenotes/

Tenable has extracted the preceding description block directly from the Fedora 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 SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:0849-1 advisory.

    Updated to Mozilla Thunderbird 128.8 MFSA 2025-18 (bsc#1237683):

      - CVE-2024-43097: Overflow when growing an SkRegion's RunArray
      - CVE-2025-1930: AudioIPC StreamData could trigger a use-after-free in the         Browser process
      - CVE-2025-1931: Use-after-free in WebTransportChild
      - CVE-2025-1932: Inconsistent comparator in XSLT sorting led to out-of-bounds         access
      - CVE-2025-1933: JIT corruption of WASM i32 return values on 64-bit CPUs
      - CVE-2025-1934: Unexpected GC during RegExp bailout processing
      - CVE-2025-1935: Clickjacking the registerProtocolHandler info-bar
      - CVE-2025-1936: Adding %00 and a fake extension to a jar: URL  changed the         interpretation of the contents
      - CVE-2025-1937: Memory safety bugs fixed in Firefox 136, Thunderbird 136,         Firefox ESR 115.21, Firefox ESR 128.8, and Thunderbird 128.8
      - CVE-2025-1938: Memory safety bugs fixed in Firefox 136, Thunderbird 136,         Firefox ESR 128.8, and Thunderbird 128.8
      - CVE-2025-26695: Downloading of OpenPGP keys from WKD used incorrect padding
      - CVE-2025-26696: Crafted email message incorrectly shown as being encrypted

      Other fixes:
      * Opening an .EML file in profiles with many folders         could take a long time.
      * Users with many folders experienced poor performance         when resizing message panes.
      *'Replace' button in compose window was overwritten         when the window was narrow.
      * Export to mobile did not work when 'Use default         server' was selected.
      * 'Save Link As' was not working in feed web content.

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 Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-bd6664e83b advisory.

    Update to 128.8.0

    * https://www.mozilla.org/en-US/security/advisories/mfsa2025-18/
    * https://www.thunderbird.net/en-US/thunderbird/128.8.0esr/releasenotes/

Tenable has extracted the preceding description block directly from the Fedora 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 Windows host is prior to 136.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-17 advisory.

  - Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. 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-2025-1938)

  - An inconsistent comparator in xslt/txNodeSorter could have resulted in potentially exploitable out-of-     bounds access. Only affected version 122 and later. (CVE-2025-1932)

  - Certain crafted MIME email messages that claimed to contain an encrypted OpenPGP message, which instead     contained an OpenPGP signed message, were wrongly shown as being encrypted. (CVE-2025-26696)

  - When requesting an OpenPGP key from a WKD server, an incorrect padding size was used and a network     observer could have learned the length of the requested email address. (CVE-2025-26695)

  - On Windows, a compromised content process could use bad StreamData sent over AudioIPC to trigger a use-     after-free in the Browser process. This could have led to a sandbox escape. (CVE-2025-1930)

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 136.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-17 advisory.

  - Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. 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-2025-1938)

  - An inconsistent comparator in xslt/txNodeSorter could have resulted in potentially exploitable out-of-     bounds access. Only affected version 122 and later. (CVE-2025-1932)

  - Certain crafted MIME email messages that claimed to contain an encrypted OpenPGP message, which instead     contained an OpenPGP signed message, were wrongly shown as being encrypted. (CVE-2025-26696)

  - When requesting an OpenPGP key from a WKD server, an incorrect padding size was used and a network     observer could have learned the length of the requested email address. (CVE-2025-26695)

  - On Windows, a compromised content process could use bad StreamData sent over AudioIPC to trigger a use-     after-free in the Browser process. This could have led to a sandbox escape. (CVE-2025-1930)

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 128.8. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-18 advisory.

  - Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. 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-2025-1938)

  - An inconsistent comparator in xslt/txNodeSorter could have resulted in potentially exploitable out-of-     bounds access. Only affected version 122 and later. (CVE-2025-1932)

  - Certain crafted MIME email messages that claimed to contain an encrypted OpenPGP message, which instead     contained an OpenPGP signed message, were wrongly shown as being encrypted. (CVE-2025-26696)

  - When requesting an OpenPGP key from a WKD server, an incorrect padding size was used and a network     observer could have learned the length of the requested email address. (CVE-2025-26695)

  - In resizeToAtLeast of SkRegion.cpp, there was a possible out of bounds write due to an integer overflow     (CVE-2024-43097)

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 Windows host is prior to 128.8. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-18 advisory.

  - Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. 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-2025-1938)

  - An inconsistent comparator in xslt/txNodeSorter could have resulted in potentially exploitable out-of-     bounds access. Only affected version 122 and later. (CVE-2025-1932)

  - Certain crafted MIME email messages that claimed to contain an encrypted OpenPGP message, which instead     contained an OpenPGP signed message, were wrongly shown as being encrypted. (CVE-2025-26696)

  - When requesting an OpenPGP key from a WKD server, an incorrect padding size was used and a network     observer could have learned the length of the requested email address. (CVE-2025-26695)

  - In resizeToAtLeast of SkRegion.cpp, there was a possible out of bounds write due to an integer overflow     (CVE-2024-43097)

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

ID	Name	Product	Family	Severity
233716	Amazon Linux 2 : thunderbird (ALAS-2025-2807)	Nessus	Amazon Linux Local Security Checks	medium
232725	Fedora 40 : thunderbird (2025-4b50cd66a5)	Nessus	Fedora Local Security Checks	high
232679	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : MozillaThunderbird (SUSE-SU-2025:0849-1)	Nessus	SuSE Local Security Checks	high
232636	Fedora 41 : thunderbird (2025-bd6664e83b)	Nessus	Fedora Local Security Checks	critical
222958	Mozilla Thunderbird < 136.0	Nessus	Windows	critical
222957	Mozilla Thunderbird < 136.0	Nessus	MacOS X Local Security Checks	critical
222870	Mozilla Thunderbird < 128.8	Nessus	MacOS X Local Security Checks	critical
222869	Mozilla Thunderbird < 128.8	Nessus	Windows	critical

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