High severity7.3NVD Advisory· Published May 19, 2026· Updated May 19, 2026
CVE-2026-8947
CVE-2026-8947
Description
Use-after-free in the DOM: Bindings (WebIDL) 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
15>=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-coords9 versionspkg:apk/chainguard/firefoxpkg:apk/chainguard/firefox-esrpkg: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+ 8 more
- (no CPE)range: < 151.0.1-r0
- (no CPE)range: < 140.11.0-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
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