CVE-2026-4720 Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149

Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, 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...

CVE-2026-4728 Spoofing issue in the Privacy: Anti-Tracking component

Spoofing issue in the Privacy: Anti-Tracking component. This vulnerability was fixed in Firefox 149 and Thunderbird 149...

CVE-2026-4716

Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9...

CVE-2026-4713

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

CVE-2026-4711

Use-after-free in the Widget: Cocoa component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9...

CVE-2026-4707

Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9...

CVE-2026-4704

Denial-of-service in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9...

CVE-2026-4723 Use-after-free in the JavaScript Engine component

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

CVE-2026-4722

Privilege escalation in the IPC component. This vulnerability was fixed in Firefox 149 and Thunderbird 149...

CVE-2026-4722 Privilege escalation in the IPC component

Privilege escalation in the IPC component. This vulnerability was fixed in Firefox 149 and Thunderbird 149...

CVE-2026-4722

CVE-2026-4722 describes a privilege escalation in the IPC component affecting Firefox

CVE-2026-4693

CVE-2026-4693: Affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR

CVE-2026-4691 Use-after-free in the CSS Parsing and Computation component

Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9...

CVE-2026-4684

CVE-2026-4684 describes a race condition leading to a use-after-free in the Graphics: WebRender component. Affected products/versions are Firefox < 149, Firefox ESR < 115.34, and Firefox ESR

Mozilla多款产品 代码问题漏洞

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-2026-27419

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 149 Firefox ESR versions 115.33 through 140.8 Thunderbird versions prior to 149 Thunderbird ESR versions 140.8 through 140.9 Description The software contains memory safety bugs, some of which demonstrate evidence of...

PT-2026-27405

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 bounda...

PT-2026-27407

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 Audio/Video: GMP component contains incorrect boundary...

PT-2026-27402

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 denial-of-service issue exists in the WebRTC: Signaling component. Recommendations Update...