Critical severity10.0NVD Advisory· Published Mar 24, 2026· Updated Apr 13, 2026
CVE-2026-4692
CVE-2026-4692
Description
Sandbox escape in the Responsive Design Mode component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
Affected products
4cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <149.0
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <115.34.0
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*range: <149.0
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*range: <140.9.0
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
6- www.mozilla.org/security/advisories/mfsa2026-20/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-21/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-22/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-23/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-24/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
News mentions
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