{"id":"CVE-2026-124861","published":"2026-11-10T14:17:18.447","lastModified":"2026-11-10T21:19:10.263","description":"Sandbox escape due to use-after-free in the Audio/Video: cubeb component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.","cvssScore":9.6,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2074210","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-125/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-126/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-127/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-128/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-129/","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"A use-after-free flaw in Firefox's cubeb audio/video component allows an attacker to escape the browser sandbox after tricking a user into visiting a malicious site. Successful exploitation could lead to arbitrary code execution with the same privileges as the compromised browser process.","exploitability":"Exploitation requires user interaction (e.g., visiting a crafted webpage) and reliable memory corruption primitives, making it moderately difficult but feasible for skilled attackers targeting Firefox users.","blast_radius":"If exploited, attackers could gain full control of the affected application (Firefox or Thunderbird), potentially leading to data theft, lateral movement, or further compromise of the host system.","remediation":"Upgrade to Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, or Thunderbird 153.7 immediately.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["sandbox-escape","use-after-free","rce","browser","web"],"model":"garnet-coder","analyzedAt":"2026-11-11T09:54:31.934Z"}}