CVE-2026-6748
Uninitialized memory in the Audio/Video: Web Codecs component
CVSS Score
9.8
EPSS Score
0.4%
EPSS Percentile
32th
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.
| Vendor | mozilla |
| Product | firefox |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 21, 2026 |
| Last Updated | Jul 15, 2026 |
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Affected Versions
Mozilla / Firefox
All versions affected Mozilla / Thunderbird
All versions affected References
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2022604 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-30/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-32/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-33/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-34/ access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-6748 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2460103 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6748.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19704 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:17690 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19463 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:10767 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:12285 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19041 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19131 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:10766 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:13537 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19655 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19465 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19542 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19466 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:17477 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19467 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:17687 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19468 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:17689 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19461 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19464 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19469 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:17688 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19462 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:10757 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:15892 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19201 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19348
Credits
Inseo An