CVE-2026-92066 PUBLISHED

Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.

• Mozilla

• https://bugzilla.mozilla.org/show_bug.cgi?id=2058093
• https://www.mozilla.org/security/advisories/mfsa2026-90/
• https://www.mozilla.org/security/advisories/mfsa2026-94/