CVE-2026-74952 PUBLISHED

Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 154 and Thunderbird 154.

• Tomoya Nakanishi

• https://bugzilla.mozilla.org/show_bug.cgi?id=2021757
• https://www.mozilla.org/security/advisories/mfsa2026-74/
• https://www.mozilla.org/security/advisories/mfsa2026-78/