{"id":"CVE-2026-124900","published":"2026-11-10T14:17:23.663","lastModified":"2026-11-10T19:20:59.537","description":"Sandbox escape due to use-after-free in the DOM: Service Workers component. This vulnerability was fixed in Firefox 160 and Thunderbird 160.","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":["CWE-416"],"vendors":[],"products":[],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2083116","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-125/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-128/","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"A use-after-free flaw in Firefox and Thunderbird's DOM Service Workers component allows an attacker to escape the browser sandbox after tricking a user into visiting a malicious site. This enables full compromise of the application's memory space.","exploitability":"Exploitation requires user interaction (e.g., visiting a crafted webpage) and precise memory manipulation due to the use-after-free nature, making reliable exploitation non-trivial but feasible for advanced attackers.","blast_radius":"Successful exploitation grants attackers full access to the victim's browser process, enabling data theft, credential harvesting, or lateral movement within the user's session.","remediation":"Upgrade Firefox to version 160 or later, or upgrade Thunderbird to version 160 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["sandbox-escape","use-after-free","dom","web-browser","cwe-416"],"model":"garnet-coder","analyzedAt":"2026-11-11T09:54:46.868Z"}}