High severity8.1NVD Advisory· Published Sep 15, 2026· Updated Oct 6, 2026
CVE-2026-92019
CVE-2026-92019
Description
Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
Affected products
12cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <115.41.0
- (no CPE)range: before 156
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <140.16.0
- (no CPE)range: before 156
- Range: before 115.41, before 140.16, before 153.3
- osv-coords7 versionspkg:rpm/almalinux/firefoxpkg:rpm/almalinux/firefox-x11pkg:rpm/almalinux/thunderbirdpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed
< 140.16.0-1.el10_2+ 6 more
- (no CPE)range: < 140.16.0-1.el10_2
- (no CPE)range: < 140.16.0-1.el9_8.alma.1
- (no CPE)range: < 140.16.0-1.el9_8.alma.1
- (no CPE)range: < 153.3.0-160000.1.1
- (no CPE)range: < 156.0-1.1
- (no CPE)range: < 140.16.0-1.1
- (no CPE)range: < 153.3.0-1.1
Patches
Vulnerability mechanics
References
8- www.mozilla.org/security/advisories/mfsa2026-90/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-91/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-92/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-93/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-94/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-95/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-96/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
News mentions
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