{"schema":"threatline.record/2","record":{"id":"CVE-2026-117921","aliases":[],"summary":"Use-after-free in the CSS Parsing and Computation component","details":"Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, and Firefox ESR 153.6.","categories":["Applications & CMS"],"product":"Firefox","vendor":"Mozilla","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-117921","source_modified_at":"2026-10-27T14:05:26.114Z","fetched_at":"2026-10-27T16:27:21.584480Z","product":"Firefox","vendor":"Mozilla","versions":[{"status":"unaffected","version":"115.44","lessThanOrEqual":"115.*","versionType":"rpm"},{"status":"unaffected","version":"153.6","lessThanOrEqual":"153.*","versionType":"rpm"},{"status":"unaffected","version":"159","lessThanOrEqual":"*","versionType":"rpm"}],"defaultStatus":null}],"fixed_versions":[],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-27T14:05:26.114Z","modified_at":"2026-10-27T14:05:26.114Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-117921","fetched_at":"2026-10-27T16:27:21.584480Z","source_modified_at":"2026-10-27T14:05:26.114Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2079687"},{"source":"CVE List","url":"https://www.mozilla.org/security/advisories/mfsa2026-118/"},{"source":"CVE List","url":"https://www.mozilla.org/security/advisories/mfsa2026-119/"},{"source":"CVE List","url":"https://www.mozilla.org/security/advisories/mfsa2026-120/"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-27T14:05:26.114Z","content_hash":"b3f18d9f97f20e840e62ccd1ec28a710b675dd0228f79e34963330f676de7c3a"}}