CVE-2026-12315 PUBLISHED

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12.

• Nguyen Minh

• https://bugzilla.mozilla.org/show_bug.cgi?id=2042058
• https://www.mozilla.org/security/advisories/mfsa2026-57/
• https://www.mozilla.org/security/advisories/mfsa2026-58/