Critical severity9.6NVD Advisory· Published May 19, 2026· Updated May 19, 2026
CVE-2026-8953
CVE-2026-8953
Description
Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
14>=140,<140.11+ 4 more
- (no CPE)range: >=140,<140.11
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <151.0.0
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <115.36.0
- (no CPE)range: <115.36
- (no CPE)range: <151
- osv-coords8 versionspkg:apk/chainguard/firefoxpkg:apk/wolfi/firefoxpkg:rpm/almalinux/firefoxpkg:rpm/almalinux/firefox-x11pkg:rpm/almalinux/thunderbirdpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweed
< 151.0.1-r0+ 7 more
- (no CPE)range: < 151.0.1-r0
- (no CPE)range: < 151.0.1-r0
- (no CPE)range: < 140.11.0-1.el9_8.alma.1
- (no CPE)range: < 140.11.0-1.el9_8.alma.1
- (no CPE)range: < 140.11.0-1.el9_8.alma.1
- (no CPE)range: < 140.11.0-1.1
- (no CPE)range: < 151.0.1-1.1
- (no CPE)range: < 140.11.1-1.1
Patches
Vulnerability mechanics
References
6- www.mozilla.org/security/advisories/mfsa2026-46/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-47/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-48/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-50/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-51/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
News mentions
1- Mozilla Firefox: 25 CVEs Patched in May 2026 Update, Including Four Critical Sandbox EscapesVypr Intelligence · May 19, 2026