EUVD-2026-14853

Incorrect boundary conditions in the Graphics: Text component. This vulnerability affects Firefox 149 and Firefox ESR 140.9...

EUVD-2026-14811

Use-after-free in the Layout: Text and Fonts component. This vulnerability affects Firefox 149, Firefox ESR 115.34, and Firefox ESR 140.9...

CVE-2026-4718

CVE-2026-4718 is an undefined behavior vulnerability in the WebRTC: Signaling component that affects Firefox and Thunderbird products. Public advisories indicate fixes in Firefox 149 and Firefox ESR 140.9, and Thunderbird 149 and Thunderbird 140.9. The connected sources also enumerate broader Moz...

CVE-2026-4714 Incorrect boundary conditions in the Audio/Video component

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

CVE-2026-4714

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

CVE-2026-4712

The CVE covers an information-disclosure vulnerability in the Widget: Cocoa component affecting Firefox before 149 and Firefox ESR before 140.9. Affected product/component: Firefox/Firefox ESR on Cocoa widgets; vulnerability details (root cause, exploitability) are not provided in the supplied do...

CVE-2026-4701

CVE-2026-4701 is a use-after-free vulnerability in the JavaScript Engine. It affects Firefox and Thunderbird products and is fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. Exploitation status is not provided in the connected documents.

CVE-2026-4692 Sandbox escape in the Responsive Design Mode component

Sandbox escape in the Responsive Design Mode component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9...

CVE-2026-4688 Sandbox escape due to use-after-free in the Disability Access APIs component

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9...

PT-2026-27398

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 issue involves incorrect boundary conditions within th...