CVE-2026-4729 Memory safety bugs fixed in Firefox 149 and Thunderbird 149

Memory safety bugs present in Firefox 148 and Thunderbird 148. 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 was fixed in Firefox 149 and Thunderbird 149...

CVE-2026-4720

CVE-2026-4720 is a memory-safety issue affecting Mozilla products (Firefox/Thunderbird). Connected advisories confirm memory-corruption-type bugs in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148, and Thunderbird 148, with the practical impact stated as potential arbitrary code execution. ...

CVE-2026-4729

CVE-2026-4729 affects Firefox 148 and Thunderbird 148, with memory-safety bugs that could lead to memory corruption and potential arbitrary-code execution. The issues were fixed in Firefox 149 and Thunderbird 149. Mitigation: upgrade to the fixed versions (Firefox 149 / Thunderbird 149). Exploita...

CVE-2026-4718

Undefined behavior in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9...

CVE-2026-4717 Privilege escalation in the Netmonitor component

Privilege escalation in the Netmonitor component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9...

CVE-2026-4705 Undefined behavior in the WebRTC: Signaling component

Undefined behavior in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9...

CVE-2026-4701 Use-after-free in the JavaScript Engine component

Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9...

CVE-2026-4694 Incorrect boundary conditions, integer overflow in the Graphics component

Incorrect boundary conditions, integer overflow in the Graphics component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9...

CVE-2026-4692

This CVE (CVE-2026-4692) is a confirmed issue in the Responsive Design Mode component, leading to sandbox escape. The primary affected product is Mozilla Firefox (and related ESR builds) with versions prior to the fixed releases: Firefox 149, Firefox ESR 115.34, and Firefox ESR 140.9; Thunderbird...

CVE-2026-4691

The CVE-2026-4691 entry describes a use-after-free in Firefox’s CSS Parsing and Computation component. Affected products/versions, as documented across connected sources, include Firefox versions prior to 149 and Firefox ESR prior to 115.34 and 140.9. The root cause is a use-after-free in the CSS...

Mozilla多款产品 安全漏洞

Mozilla Firefox, among others, are products of the American Mozilla Foundation. Mozilla Firefox is an open-source web browser. Mozilla Firefox ESR is a extended support version of Firefox the web browser. Mozilla Thunderbird is an email client software that emerged independently from the Mozilla...

PT-2026-27391

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 sandbox escape issue exists in the Responsive Design Mod...

PT-2026-27413

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 An issue exists in the Graphics: Canvas2D component due to uninitialized memory. Recommendation...