CVE-2026-84143

CVE-2026-84143 covers internally found bugs in Thunderbird 154 , Thunderbird ESR 153.1 , and Thunderbird ESR 140.14 , some showing evidence of memory corruption or other security-relevant defects. Mozilla presumes some could have been exploited with enough effort, but no confirmed in-the-wild exp...

firefox: thunderbird: Internally found bugs fixed in Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another...

SUSE-SU-2026:3658-1 Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issues: Update to Firefox Extended Support Release 140.14.0 ESR. - MFSA 2026-74 bsc1274867 - CVE-2026-74934: Site isolation issue in the Graphics: CanvasWebGL component. - CVE-2026-74935: Privilege escalation in the DOM: Networking component. -...

CVE-2026-74990

Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was...

CVE-2026-74942

Privilege escalation in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1...

Security Vulnerabilities fixed in Firefox ESR 140.14 — Mozilla

Internally found bugs present in Firefox ESR 140.13, Firefox ESR 153.0 and Firefox 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. Internally found bugs present in...

PT-2026-77020

Name of the Vulnerable Software and Affected Versions Firefox ESR version 140.13 Firefox ESR version 153.0 Firefox version 153 Thunderbird ESR version 140.13 Thunderbird ESR version 153.0 Thunderbird version 153 Description Internal bugs were identified that exhibit evidence of memory corruption ...

CVE-2026-16361

Memory safety bugs present in Thunderbird ESR 140.12. 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 ESR 115.38, Firefox ESR 140.13, and Thunderbi...

KLA91015 Multiple vulnerabilities in Mozilla Thunderbird

Multiple vulnerabilities were found in Mozilla Thunderbird. Malicious users can exploit these vulnerabilities to obtain sensitive information, execute arbitrary code, cause denial of service. Below is a complete list of vulnerabilities: 1. Information disclosure vulnerability in the Audio/Video...

CVE-2026-6747

Use-after-free in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10...

OESA-2026-1451 libvpx security update

libvpx provides the VP8/VP9 SDK, which allows you to integrate your applications with the VP8 and VP9 video codecs, high quality, royalty free, open source codecs deployed on millions of computers and devices worldwide. Security Fixes: Heap buffer overflow vulnerability exists in libvpx component...