High severity8.8NVD Advisory· Published Sep 15, 2026· Updated Oct 6, 2026
CVE-2026-92021
CVE-2026-92021
Description
Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 140.16 and Thunderbird 140.16.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
8- osv-coords4 versionspkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/almalinux/firefoxpkg:rpm/almalinux/thunderbirdpkg:rpm/almalinux/firefox-x11
< 140.16.0-1.1+ 3 more
- (no CPE)range: < 140.16.0-1.1
- (no CPE)range: < 140.16.0-1.el10_2
- (no CPE)range: < 140.16.0-1.el9_8.alma.1
- (no CPE)range: < 140.16.0-1.el9_8.alma.1
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <140.16.0
- (no CPE)range: =140.16
- Range: =140.16
Patches
Vulnerability mechanics
References
3- www.mozilla.org/security/advisories/mfsa2026-92/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-95/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
News mentions
0No linked articles in our index yet.