High severity8.1NVD Advisory· Published Aug 18, 2026· Updated Aug 24, 2026
CVE-2026-74957
CVE-2026-74957
Description
Mitigation bypass in the Safe Browsing 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
12- osv-coords10 versionspkg:rpm/almalinux/firefoxpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/almalinux/thunderbirdpkg:rpm/almalinux/firefox-x11pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/mozilla-nss&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/rust-cbindgen&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/mozilla-nspr&distro=openSUSE%20Leap%2016.0
< 140.14.0-1.el9_8.alma.1+ 9 more
- (no CPE)range: < 140.14.0-1.el9_8.alma.1
- (no CPE)range: < 153.1.0-1.1
- (no CPE)range: < 154.0-1.1
- (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: < 140.14.0-160000.1.1
- (no CPE)range: < 3.125-160000.1.1
- (no CPE)range: < 0.29.4+git0-160000.1.1
- (no CPE)range: < 140.14.0-1.1
- (no CPE)range: < 4.39-160000.1.1
- Range: up to 154
- Range: up to 154, up to 140.14, up to 153.1
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
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