{"id":"CVE-2026-92005","title":"Use-after-free in the Audio/Video: Web Codecs component","summary":"Use-after-free in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-416","CWE-825"],"vendor":"Mozilla","product":"Firefox","affected":["Firefox","Thunderbird"],"published":"2026-09-15","updated":"2026-09-17","sourceUpdated":"2026-09-17T21:17:53.067","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92005","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2056051","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-92/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-94/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-95/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-96/","label":"security@mozilla.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92005.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-92005"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533778"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92005"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92005"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-92/#CVE-2026-92005"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-95/#CVE-2026-92005"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-17T20:35:53.633305Z"},"epss":0.00381,"epssPercentile":0.31836,"scores":{"nvd":5.3,"vendor":7.5},"ingestedAt":"2026-09-15T12:36:50.201Z","slug":"CVE-2026-92005","body":"## Overview\n\nUse-after-free in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, … · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92005.json)","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":206593,"id":"CVE-2026-92005","ts":1789680591409,"field":"cvss","old":"7.5","new":"5.3"},{"seq":206592,"id":"CVE-2026-92005","ts":1789680591409,"field":"severity","old":"high","new":"medium"},{"seq":206411,"id":"CVE-2026-92005","ts":1789663225521,"field":"cvss","old":null,"new":"7.5"},{"seq":206410,"id":"CVE-2026-92005","ts":1789663225521,"field":"severity","old":"none","new":"high"}]}