{"id":"CVE-2026-92021","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-92021","summary":"Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 140.16 and Thunderbird 140.16.","details":"Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 140.16 and Thunderbird 140.16.","published":"2026-09-15T13:16:52.210","modified":"2026-09-20T01:16:34.863","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2067208"},{"type":"WEB","url":"https://www.mozilla.org/security/advisories/mfsa2026-92/"},{"type":"WEB","url":"https://www.mozilla.org/security/advisories/mfsa2026-95/"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-20T01:16:34.863"}}