{"id":"CVE-2026-109707","title":"Sandbox escape due to use-after-free in the Networking component","summary":"Sandbox escape due to use-after-free in the Networking component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5.","severity":"critical","cvss":9.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","cwe":["CWE-416"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T16:18:13.247","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109707","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2059150","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","label":"security@mozilla.org"}],"tags":["nvd"],"ingestedAt":"2026-10-13T13:27:03.991Z","slug":"CVE-2026-109707","body":"## Overview\n\nSandbox escape due to use-after-free in the Networking component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":52.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":219725,"id":"CVE-2026-109707","ts":1791905690947,"field":"cvss","old":null,"new":"9.6"},{"seq":219724,"id":"CVE-2026-109707","ts":1791905690947,"field":"severity","old":"none","new":"critical"}]}