{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-12306", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "state": "PUBLISHED", "assignerShortName": "mozilla", "dateReserved": "2026-06-15T15:08:13.015Z", "datePublished": "2026-06-16T11:52:39.808Z", "dateUpdated": "2026-06-16T16:08:33.059Z"}, "containers": {"cna": {"affected": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "140.12", "lessThanOrEqual": "140.*", "versionType": "rpm"}, {"status": "unaffected", "version": "152", "lessThanOrEqual": "*", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "140.12", "lessThanOrEqual": "140.*", "versionType": "rpm"}, {"status": "unaffected", "version": "152", "lessThanOrEqual": "*", "versionType": "rpm"}]}], "descriptions": [{"lang": "en", "value": "Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12."}]}], "title": "Memory safety bug fixed in Thunderbird 152", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2037323"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-57/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-58/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-60/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-61/"}], "credits": [{"lang": "en", "value": "Mihalis Haatainen"}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2026-06-16T16:08:33.059Z"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12."}], "id": "CVE-2026-12306", "lastModified": "2026-06-16T17:16:35.320", "metrics": {}, "published": "2026-06-16T13:16:30.833", "references": [{"source": "security@mozilla.org", "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2037323"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-57/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-58/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-60/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-61/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Undergoing Analysis"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[140.12,*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[152,*]"}}], "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": "2026-06-16T15:00:06.893476+00:00", "updated": "2026-06-16T15:00:06.893510+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox"]}