High severity8.8NVD Advisory· Published May 19, 2026· Updated Jul 23, 2026
CVE-2026-8973
CVE-2026-8973
Description
Memory safety bugs present in 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 and Thunderbird 151.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
10>=150,<151+ 2 more
- (no CPE)range: >=150,<151
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <151.0.0
- (no CPE)range: <151
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*range: <151.0.0
- (no CPE)range: <151
- osv-coords5 versionspkg:apk/chainguard/firefoxpkg:apk/chainguard/firefox-esrpkg:apk/wolfi/firefoxpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed
< 151-r0+ 4 more
- (no CPE)range: < 151-r0
- (no CPE)range: < 0
- (no CPE)range: < 151-r0
- (no CPE)range: < 151.0.1-1.1
- (no CPE)range: < 153.0-1.1
Patches
Vulnerability mechanics
References
6- www.mozilla.org/security/advisories/mfsa2026-46/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-50/nvdVendor Advisory
- bugzilla.mozilla.org/buglist.cginvdBroken Link
- access.redhat.com/security/cve/CVE-2026-8973nvd
- bugzilla.redhat.com/show_bug.cginvd
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8973.jsonnvd
News mentions
1- Mozilla Firefox: 25 CVEs Patched in May 2026 Update, Including Four Critical Sandbox EscapesVypr Intelligence · May 19, 2026