RLSA-2026:49621 Important: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fixes: firefox: thunderbird: Site isolation issue in the DOM: Navigation component CVE-2026-15719 firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component CVE-2026-15718 firefox: thunderbird: Mitigation...

CVE-2026-16362

A use-after-free vulnerability exists in the WebRTC: Audio/Video component of the Mozilla Firefox and Thunderbird browsers. This security flaw could potentially allow for the execution of arbitrary code. The issue has been resolved in Firefox 153 , Firefox ESR 140.13 , and Thunderbird 153/140.13 ...

Mozilla Firefox and Mozilla Thunderbird security vulnerabilities

Mozilla Firefox and Mozilla Thunderbird are both products of the American Mozilla Foundation. Mozilla Firefox is an open-source web browser. Mozilla Thunderbird is an email client software that emerged independently from the Mozilla Application Suite. This software supports IMAP and POP email...