{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-12294", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "state": "PUBLISHED", "assignerShortName": "mozilla", "dateReserved": "2026-06-15T15:08:07.929Z", "datePublished": "2026-06-16T11:52:27.895Z", "dateUpdated": "2026-06-16T16:08:26.614Z"}, "containers": {"cna": {"affected": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "115.37", "lessThanOrEqual": "115.*", "versionType": "rpm"}, {"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": "Sandbox escape in the DOM: Workers component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Sandbox escape in the DOM: Workers component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12."}]}], "title": "Sandbox escape in the DOM: Workers component", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2039873"}, {"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/mfsa2026-59/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-60/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-61/"}], "credits": [{"lang": "en", "value": "Quy Pham"}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2026-06-16T16:08:26.614Z"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Sandbox escape in the DOM: Workers component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12."}], "id": "CVE-2026-12294", "lastModified": "2026-06-16T17:16:33.307", "metrics": {}, "published": "2026-06-16T13:16:29.643", "references": [{"source": "security@mozilla.org", "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2039873"}, {"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/mfsa2026-59/"}, {"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": "[115.37,115.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[140.12,140.*]"}}, {"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": "2026-06-16T15:00:06.895039+00:00", "updated": "2026-06-16T15:00:06.895060+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox"]}