Critical severity9.8NVD Advisory· Published Apr 21, 2026· Updated Jul 15, 2026
CVE-2026-6748
CVE-2026-6748
Description
Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
14cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*+ 2 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <150.0
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <140.10.0
- (no CPE)range: >=150
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*range: <140.10.0
- (no CPE)range: >=150
- osv-coords9 versionspkg:apk/chainguard/firefoxpkg:apk/chainguard/firefox-esrpkg:apk/wolfi/firefoxpkg:rpm/almalinux/firefoxpkg:rpm/almalinux/firefox-x11pkg:rpm/almalinux/thunderbirdpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed
< 140.10-r0+ 8 more
- (no CPE)range: < 140.10-r0
- (no CPE)range: < 140.10-r0
- (no CPE)range: < 140.10-r0
- (no CPE)range: < 140.10.0-1.el9_7.alma.1
- (no CPE)range: < 140.10.0-1.el9_7.alma.1
- (no CPE)range: < 140.10.0-1.el10_1.alma.1
- (no CPE)range: < 150.0-1.1
- (no CPE)range: < 140.9.1-1.1
- (no CPE)range: < 153.0-1.1
Patches
Vulnerability mechanics
References
35- www.mozilla.org/security/advisories/mfsa2026-30/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-32/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-33/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-34/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
- access.redhat.com/errata/RHSA-2026:10757nvd
- access.redhat.com/errata/RHSA-2026:10766nvd
- access.redhat.com/errata/RHSA-2026:10767nvd
- access.redhat.com/errata/RHSA-2026:12285nvd
- access.redhat.com/errata/RHSA-2026:13537nvd
- access.redhat.com/errata/RHSA-2026:15892nvd
- access.redhat.com/errata/RHSA-2026:17477nvd
- access.redhat.com/errata/RHSA-2026:17687nvd
- access.redhat.com/errata/RHSA-2026:17688nvd
- access.redhat.com/errata/RHSA-2026:17689nvd
- access.redhat.com/errata/RHSA-2026:17690nvd
- access.redhat.com/errata/RHSA-2026:19041nvd
- access.redhat.com/errata/RHSA-2026:19131nvd
- access.redhat.com/errata/RHSA-2026:19201nvd
- access.redhat.com/errata/RHSA-2026:19348nvd
- access.redhat.com/errata/RHSA-2026:19461nvd
- access.redhat.com/errata/RHSA-2026:19462nvd
- access.redhat.com/errata/RHSA-2026:19463nvd
- access.redhat.com/errata/RHSA-2026:19464nvd
- access.redhat.com/errata/RHSA-2026:19465nvd
- access.redhat.com/errata/RHSA-2026:19466nvd
- access.redhat.com/errata/RHSA-2026:19467nvd
- access.redhat.com/errata/RHSA-2026:19468nvd
- access.redhat.com/errata/RHSA-2026:19469nvd
- access.redhat.com/errata/RHSA-2026:19542nvd
- access.redhat.com/errata/RHSA-2026:19655nvd
- access.redhat.com/errata/RHSA-2026:19704nvd
- access.redhat.com/security/cve/CVE-2026-6748nvd
- bugzilla.redhat.com/show_bug.cginvd
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6748.jsonnvd
News mentions
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