High severity7.5NVD Advisory· Published May 19, 2026· Updated Jul 15, 2026
CVE-2026-8946
CVE-2026-8946
Description
Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
16<151+ 3 more
- (no CPE)range: <151
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <115.36.0
- 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: <140.11
- (no CPE)range: >=151
- osv-coords10 versionspkg:apk/chainguard/firefoxpkg:apk/chainguard/firefox-esrpkg:apk/wolfi/firefoxpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/firefoxpkg:rpm/almalinux/firefox-x11pkg:rpm/almalinux/thunderbirdpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweed
< 151.0.1-r0+ 9 more
- (no CPE)range: < 151.0.1-r0
- (no CPE)range: < 140.11.0-r0
- (no CPE)range: < 151.0.1-r0
- (no CPE)range: < 140.12.0-bp160.1.1
- (no CPE)range: < 140.11.0-1.el9_8.alma.1
- (no CPE)range: < 140.11.0-1.el9_8.alma.1
- (no CPE)range: < 140.11.0-1.el9_8.alma.1
- (no CPE)range: < 140.11.0-1.1
- (no CPE)range: < 151.0.1-1.1
- (no CPE)range: < 140.11.1-1.1
Patches
Vulnerability mechanics
References
30- www.mozilla.org/security/advisories/mfsa2026-46/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-47/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-48/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-50/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-51/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
- access.redhat.com/errata/RHSA-2026:21378nvd
- access.redhat.com/errata/RHSA-2026:21380nvd
- access.redhat.com/errata/RHSA-2026:21381nvd
- access.redhat.com/errata/RHSA-2026:21382nvd
- access.redhat.com/errata/RHSA-2026:22325nvd
- access.redhat.com/errata/RHSA-2026:22643nvd
- access.redhat.com/errata/RHSA-2026:26174nvd
- access.redhat.com/errata/RHSA-2026:26268nvd
- access.redhat.com/errata/RHSA-2026:26269nvd
- access.redhat.com/errata/RHSA-2026:26270nvd
- access.redhat.com/errata/RHSA-2026:26491nvd
- access.redhat.com/errata/RHSA-2026:26492nvd
- access.redhat.com/errata/RHSA-2026:26493nvd
- access.redhat.com/errata/RHSA-2026:26521nvd
- access.redhat.com/errata/RHSA-2026:26536nvd
- access.redhat.com/errata/RHSA-2026:26539nvd
- access.redhat.com/errata/RHSA-2026:26551nvd
- access.redhat.com/errata/RHSA-2026:26606nvd
- access.redhat.com/errata/RHSA-2026:26629nvd
- access.redhat.com/errata/RHSA-2026:26630nvd
- access.redhat.com/errata/RHSA-2026:27715nvd
- access.redhat.com/security/cve/CVE-2026-8946nvd
- bugzilla.redhat.com/show_bug.cginvd
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8946.jsonnvd
News mentions
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