{"id":"CVE-2026-92043","title":"Privilege escalation due to incorrect boundary conditions in the Audio/Video component","summary":"Privilege escalation due to incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-120","CWE-787"],"vendor":"Mozilla","product":"Firefox","affected":["Firefox","Thunderbird"],"published":"2026-09-15","updated":"2026-09-16","sourceUpdated":"2026-09-16T19:34:05.910","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92043","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2050150","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-94/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-96/","label":"security@mozilla.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92043.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-92043"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533750"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92043"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92043"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/#CVE-2026-92043"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-94/#CVE-2026-92043"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-15T13:30:37.133937Z"},"ingestedAt":"2026-09-15T12:36:50.185Z","scores":{"nvd":8.8,"vendor":6.1},"epss":0.00255,"epssPercentile":0.17363,"slug":"CVE-2026-92043","body":"## Overview\n\nPrivilege escalation due to incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, 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** · Moderate · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92043.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":203695,"id":"CVE-2026-92043","ts":1789483135905,"field":"cvss","old":null,"new":"8.8"},{"seq":203694,"id":"CVE-2026-92043","ts":1789483135905,"field":"severity","old":"none","new":"high"}]}