Security update for MozillaThunderbird

This update for MozillaThunderbird fixes the following issues: Update to Mozilla Thunderbird 128.12 MFSA 2025-55, bsc1244670: CVE-2025-6424: Use-after-free in FontFaceSet bmo1966423 CVE-2025-6425: The WebCompat WebExtension shipped exposed a persistent UUID bmo1717672 CVE-2025-6426: No warning wh...

Security Vulnerabilities fixed in Thunderbird 140 — Mozilla

A use-after-free in FontFaceSet resulted in a potentially exploitable crash. An attacker who enumerated resources from the WebCompat extension could have obtained a persistent UUID that identified the browser, and persisted between containers and normal/private browsing mode, but not profiles. Th...

CVE-2025-6426

Mozilla Firefox on macOS fails to display an executable file warning before opening files with the terminal extension. This vulnerability allows attackers to potentially bypass security restrictions to compromise the confidentiality, integrity, and accessibility of protected information due to in...

Security Vulnerabilities fixed in Firefox 140 — Mozilla

A use-after-free in FontFaceSet resulted in a potentially exploitable crash. An attacker who enumerated resources from the WebCompat extension could have obtained a persistent UUID that identified the browser, and persisted between containers and normal/private browsing mode, but not profiles. Th...