CVE-2026-12311

MEDIUM CVSS 4.7 View on NVD ↗

Description

Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Affected Products

mozilla/firefox mozilla/thunderbird

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2040177
https://www.mozilla.org/security/advisories/mfsa2026-57/
https://www.mozilla.org/security/advisories/mfsa2026-58/
https://www.mozilla.org/security/advisories/mfsa2026-60/
https://www.mozilla.org/security/advisories/mfsa2026-61/

Published: Jun 16, 2026 13:16 UTC Modified: Jun 16, 2026 20:45 UTC