PT-2026-27390

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 149 Firefox ESR versions prior to 115.34 Firefox ESR versions prior to 140.9 Thunderbird versions prior to 149 Thunderbird versions prior to 140.9 Description A use-after-free issue exists in the CSS Parsing and...

PT-2026-21718

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 148 Firefox ESR versions prior to 140.8 Thunderbird versions prior to 148 Thunderbird versions prior to 140.8 Description The JavaScript Engine component contains an invalid pointer issue. Recommendations Update Firef...

PT-2026-21725

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 148 Firefox ESR versions prior to 140.8 Thunderbird versions prior to 148 Thunderbird ESR versions prior to 140.8 Description The software contains memory safety bugs that exhibit evidence of memory corruption. It is...

PT-2026-21726

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 148 Firefox ESR versions 115.32 through 115.32 Firefox ESR versions 140.7 through 140.7 Thunderbird versions prior to 148 Thunderbird ESR versions 140.7 through 140.7 Description The software contains memory safety...

PT-2026-21695

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 148 Firefox ESR versions prior to 140.8 Thunderbird versions prior to 148 Thunderbird versions prior to 140.8 Description An integer overflow exists in the JavaScript: Standard Library component. This issue may allow...

PT-2026-27400

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 149 Firefox ESR versions prior to 140.9 Thunderbird versions prior to 149 Thunderbird versions prior to 140.9 Description A use-after-free issue exists in the JavaScript Engine component. This condition occurs when...

PT-2026-21719

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 148 Firefox ESR versions prior to 140.8 Thunderbird versions prior to 148 Thunderbird versions prior to 140.8 Description A use-after-free issue exists in the JavaScript Engine component. This condition occurs when...

PT-2026-27414

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 149 Firefox ESR versions prior to 140.9 Thunderbird versions prior to 149 Thunderbird versions prior to 140.9 Description The software contains issues related to incorrect boundary conditions and uninitialized memory...

PT-2026-27383

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 149 Firefox ESR versions prior to 115.34 Firefox ESR versions prior to 140.9 Thunderbird versions prior to 149 Thunderbird versions prior to 140.9 Description A race condition and use-after-free issue exists in the...

PT-2026-27418

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 149 Firefox ESR versions prior to 140.9 Thunderbird versions prior to 149 Thunderbird ESR versions prior to 140.9 Description The software contains memory safety bugs, some of which demonstrate evidence of memory...

PT-2026-27393

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 149 Firefox ESR versions prior to 115.34 Firefox ESR versions prior to 140.9 Thunderbird versions prior to 149 Thunderbird versions prior to 140.9 Description An integer overflow exists within the Graphics component d...

PT-2026-27396

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 149 Firefox ESR versions prior to 140.9 Thunderbird versions prior to 149 Thunderbird versions prior to 140.9 Description The Audio/Video: Web Codecs component contains incorrect boundary conditions. Recommendations...

PT-2026-27404

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 149 Firefox ESR versions prior to 115.34 Firefox ESR versions prior to 140.9 Thunderbird versions prior to 149 Thunderbird versions prior to 140.9 Description The Graphics Canvas2D component contains incorrect boundar...

PT-2026-21693

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 148 Firefox ESR versions prior to 115.33 Firefox ESR versions prior to 140.8 Thunderbird versions prior to 148 Thunderbird versions prior to 140.8 Description A sandbox escape is possible due to incorrect boundary...

PT-2026-21717

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 148 Firefox ESR versions prior to 140.8 Thunderbird versions prior to 148 Thunderbird versions prior to 140.8 Description A mitigation bypass exists in the DOM within the Security component. This issue impacts Firefox...

ROS-20251226-7306

A vulnerability in Mozilla Firefox, Firefox ESR and Thunderbird email client is related to information disclosure. Exploitation of the vulnerability could allow a remote attacker to disclose protected information...

firefox: thunderbird: Privilege escalation in the DOM: Notifications component

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

firefox: thunderbird: Same-origin policy bypass in the Request Handling component

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Same-origin policy bypass in the Request Handling component...

firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component

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...

firefox: thunderbird: Privilege escalation in the Netmonitor component

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Privilege escalation in the Netmonitor component...