High severity8.8NVD Advisory· Published May 19, 2026· Updated May 26, 2026
CVE-2026-8974
CVE-2026-8974
Description
Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, 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
10- Range: >=140.10,<140.11
- Range: <=140.10, <=150
- 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
< 140.11-r0+ 7 more
- (no CPE)range: < 140.11-r0
- (no CPE)range: < 140.11-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
5- www.mozilla.org/security/advisories/mfsa2026-46/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/buglist.cginvdBroken Link
News mentions
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