PT-2026-49666

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Firefox ESR versions prior to 115.37 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A sandbox escape exists due to incorrect boundary...

PT-2026-49677

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A memory safety bug exists in the software, which could lead to unexpected behavior or crashe...

PT-2026-49690

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Thunderbird versions prior to 152 Description JIT miscompilation occurs in the JavaScript: WebAssembly component. Just-In-Time JIT compilation is a method used to improve the execution speed of programs by compili...

PT-2026-49688

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Thunderbird versions prior to 152 Description A denial-of-service issue exists within the Audio/Video: Playback component. Recommendations Update to version 152 for Firefox. Update to version 152 for Thunderbird...

PT-2026-49663

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Firefox ESR versions prior to 115.37 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A sandbox escape exists within the DOM: Workers componen...

PT-2026-49673

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A same-origin policy bypass exists in the Networking: Cookies component. The same-origin poli...

PT-2026-49681

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A memory safety bug exists in the software, which could lead to unexpected behavior or crashe...

PT-2026-49672

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Thunderbird versions prior to 152 Description Information disclosure occurs in the Graphics: WebGPU component due to incorrect boundary conditions. Recommendations Update Firefox to version 152. Update Thunderbird...

PT-2026-49665

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A sandbox escape exists within the Security: Process Sandboxing component. A sandbox is a...

PT-2026-49687

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Thunderbird versions prior to 152 Description Incorrect boundary conditions exist within the Libraries component of the Network Security Services NSS, which is a set of libraries providing support for security...

PT-2026-49662

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Thunderbird versions prior to 152 Description A use-after-free issue exists in the Graphics: WebGPU component. Use-after-free is a memory corruption flaw that occurs when an application continues to use a pointer...

PT-2026-49679

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A memory safety bug exists in the software, which could lead to unexpected behavior or crashe...

Security Vulnerabilities fixed in Thunderbird 152 — Mozilla

Memory safety bugs present in 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. Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11,...

PT-2026-49674

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A memory safety bug exists in the software, which could lead to unexpected behavior or crashe...

PT-2026-49676

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A memory safety bug exists in the software, which could lead to unexpected behavior or crashe...

PT-2026-49661

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description Incorrect boundary conditions exist within the Web Audio component. Recommendations Update...

PT-2026-49692

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Thunderbird versions prior to 152 Description A spoofing issue exists within the DOM: Core & HTML component...

PT-2026-49689

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Thunderbird versions prior to 152 Description Information disclosure occurs within the Password Manager component. Recommendations Update Firefox to version 152. Update Thunderbird to version 152...

PT-2026-49668

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Firefox ESR versions prior to 115.37 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description JIT miscompilation occurs in the DOM: Core & HTML...

PT-2026-49694

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Firefox ESR versions prior to 115.37 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 Description A denial-of-service issue exists within the Graphics:...