High severity8.8NVD Advisory· Published Sep 15, 2026· Updated Oct 6, 2026
CVE-2026-92023
CVE-2026-92023
Description
Use-after-free in the XML component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
12cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <115.41.0
- (no CPE)range: up to 156
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <140.16.0
- (no CPE)range: up to 156
- Range: up to 115.41, 140.16, 153.3
- osv-coords7 versionspkg:rpm/almalinux/firefoxpkg:rpm/almalinux/firefox-x11pkg:rpm/almalinux/thunderbirdpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed
< 140.16.0-1.el10_2+ 6 more
- (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
- (no CPE)range: < 153.3.0-160000.1.1
- (no CPE)range: < 156.0-1.1
- (no CPE)range: < 140.16.0-1.1
- (no CPE)range: < 153.3.0-1.1
Patches
Vulnerability mechanics
References
8- www.mozilla.org/security/advisories/mfsa2026-90/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-91/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-92/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-93/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-94/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-95/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-96/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
News mentions
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