{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-92021", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "state": "PUBLISHED", "assignerShortName": "mozilla", "dateReserved": "2026-09-15T12:33:40.656Z", "datePublished": "2026-09-15T12:33:41.163Z", "dateUpdated": "2026-09-15T19:43:11.587Z"}, "containers": {"cna": {"affected": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "140.16", "lessThanOrEqual": "*", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "140.16", "lessThanOrEqual": "*", "versionType": "rpm"}]}], "descriptions": [{"lang": "en", "value": "Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 140.16 and Thunderbird 140.16.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 140.16 and Thunderbird 140.16."}]}], "title": "Use-after-free in the JavaScript Engine: JIT component", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2067208"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-92/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-95/"}], "credits": [{"lang": "en", "value": "Tomer Fichman"}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2026-09-15T19:43:11.587Z"}}}}

{}

{"affected": [{"affectedData": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "*", "status": "unaffected", "version": "140.16", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "*", "status": "unaffected", "version": "140.16", "versionType": "rpm"}]}], "source": "security@mozilla.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 140.16 and Thunderbird 140.16."}], "id": "CVE-2026-92021", "lastModified": "2026-09-16T19:34:05.910", "metrics": {}, "published": "2026-09-15T13:16:52.210", "references": [{"source": "security@mozilla.org", "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2067208"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-92/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-95/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "firefox: Use-after-free in the JavaScript Engine: JIT component", "id": "2533774", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2533774"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:\nUse-after-free in the JavaScript Engine: JIT component"], "name": "CVE-2026-92021", "public_date": "2026-09-15T12:33:41Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-92021\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-92021\nhttps://www.mozilla.org/security/advisories/mfsa2026-92/#CVE-2026-92021"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "140.16"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Firefox", "source": "cna", "vendor": "Mozilla"}, "product": "firefox", "vendor": "mozilla"}], "created": "2026-09-15T13:45:07.650628+00:00", "updated": "2026-09-16T05:30:13.460925+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox"], "weaknesses": ["CWE-416"]}