High severity8.8NVD Advisory· Published Aug 18, 2026· Updated Aug 21, 2026
CVE-2026-74965
CVE-2026-74965
Description
Privilege escalation in the Shell Integration component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
20- osv-coords14 versionspkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/almalinux/firefoxpkg:rpm/almalinux/thunderbirdpkg:rpm/almalinux/firefox-x11pkg:apk/chainguard/firefoxpkg:apk/chainguard/firefox-docker-selenium-compatpkg:apk/wolfi/firefoxpkg:apk/wolfi/firefox-docker-selenium-compatpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/mozilla-nspr&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/mozilla-nss&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/rust-cbindgen&distro=openSUSE%20Leap%2016.0
< 140.14.0-160000.1.1+ 13 more
- (no CPE)range: < 140.14.0-160000.1.1
- (no CPE)range: < 153.1.0-1.1
- (no CPE)range: < 140.14.0-1.el9_8.alma.1
- (no CPE)range: < 140.14.0-1.el9_8.alma.1
- (no CPE)range: < 140.14.0-1.el9_8.alma.1
- (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: < 154.0-1.1
- (no CPE)range: < 4.39-160000.1.1
- (no CPE)range: < 3.125-160000.1.1
- (no CPE)range: < 140.14.0-1.1
- (no CPE)range: < 0.29.4+git0-160000.1.1
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*+ 3 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <140.14.0
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <154.0.0
- cpe:2.3:a:mozilla:firefox:153.0:*:*:*:esr:*:*:*
- (no CPE)range: up to 154
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*range: <140.14.0
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*range: <154.0
Patches
Vulnerability mechanics
References
7- www.mozilla.org/security/advisories/mfsa2026-74/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-76/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-77/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-78/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-79/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-80/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
News mentions
1- Mozilla Thunderbird: 25 Vulnerabilities Disclosed, Ranging from Critical to Medium SeverityVypr Intelligence · Aug 18, 2026