Critical severity9.8NVD Advisory· Published Apr 21, 2026· Updated Apr 22, 2026
CVE-2026-6771
CVE-2026-6771
Description
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Affected products
3cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <150.0
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: >=140.0,<140.10.0
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*Range: >=140.0,<140.10.0
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- www.mozilla.org/security/advisories/mfsa2026-30/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-32/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-33/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-34/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
News mentions
0No linked articles in our index yet.