{"id":"CVE-2026-124864","published":"2026-11-10T14:17:18.810","lastModified":"2026-11-10T21:19:10.790","description":"Sandbox escape due to use-after-free in the DOM: Service Workers 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":["CWE-416"],"vendors":[],"products":[],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2075976","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 vulnerability in Firefox and Thunderbird's DOM Service Workers component allows an attacker to escape the browser sandbox via a specially crafted web page, leading to arbitrary code execution with the privileges of the compromised process.","exploitability":"Exploitation requires user interaction (e.g., visiting a malicious website) and precise memory manipulation due to the use-after-free nature, but low attack complexity makes it feasible for skilled attackers.","blast_radius":"Successful exploitation could lead to full system compromise via sandbox escape, enabling theft of sensitive data, installation of malware, or lateral movement within the user's environment.","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","dom","service-workers","browser-vulnerability"],"model":"garnet-coder","analyzedAt":"2026-11-11T09:54:39.676Z"}}