Critical severity9.1NVD Advisory· Published May 19, 2026· Updated May 20, 2026
CVE-2026-8948
CVE-2026-8948
Description
Same-origin policy bypass in the DOM: Networking component. 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
9<151+ 2 more
- (no CPE)range: <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-coords4 versionspkg:apk/chainguard/firefoxpkg:apk/chainguard/firefox-esrpkg:apk/wolfi/firefoxpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweed
< 151-r0+ 3 more
- (no CPE)range: < 151-r0
- (no CPE)range: < 151-r0
- (no CPE)range: < 151-r0
- (no CPE)range: < 151.0.1-1.1
Patches
Vulnerability mechanics
References
3- www.mozilla.org/security/advisories/mfsa2026-46/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-50/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