{"id":"CVE-2026-8954","title":"Incorrect boundary conditions, integer overflow in the Audio/Video component","summary":"Incorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-119"],"vendor":"mozilla","product":"firefox","affected":["firefox < 140.11.0","firefox < 151.0.0","thunderbird < 140.11"],"patched":["firefox 151.0.0","thunderbird 140.11"],"published":"2026-05-19","updated":"2026-10-14","sourceUpdated":"2026-10-14T20:10:00.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-8954","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2030747","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-46/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-48/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-50/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-51/","label":"security@mozilla.org"}],"tags":["nvd"],"epss":0.00431,"epssPercentile":0.358,"ingestedAt":"2026-10-14T20:53:12.315Z","slug":"CVE-2026-8954","body":"## Overview\n\nIncorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.\n\n## Affected\n\n- `firefox < 140.11.0`\n- `firefox < 151.0.0`\n- `thunderbird < 140.11`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 151.0.0`\n- `thunderbird 140.11`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}