High severity8.8NVD Advisory· Published Aug 18, 2026· Updated Sep 1, 2026
CVE-2026-74952
CVE-2026-74952
Description
Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 154, Thunderbird 154, Firefox ESR 153.2, and Thunderbird 153.2.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
9- Range: <154
- Range: <154
- osv-coords7 versionspkg:apk/chainguard/firefoxpkg:apk/chainguard/firefox-docker-selenium-compatpkg:apk/wolfi/firefoxpkg:apk/wolfi/firefox-docker-selenium-compatpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed
< 154.0-r0+ 6 more
- (no CPE)range: < 154.0-r0
- (no CPE)range: < 154.0-r0
- (no CPE)range: < 154.0-r0
- (no CPE)range: < 154.0-r0
- (no CPE)range: < 153.2.0-160000.1.1
- (no CPE)range: < 154.0-1.1
- (no CPE)range: < 153.2.0-1.1
Patches
Vulnerability mechanics
References
5- www.mozilla.org/security/advisories/mfsa2026-74/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-78/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
- www.mozilla.org/security/advisories/mfsa2026-85/nvd
- www.mozilla.org/security/advisories/mfsa2026-88/nvd
News mentions
1- Mozilla Thunderbird: 25 Vulnerabilities Disclosed, Ranging from Critical to Medium SeverityVypr Intelligence · Aug 18, 2026