{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-109759", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "state": "PUBLISHED", "assignerShortName": "mozilla", "dateReserved": "2026-10-13T00:48:22.956Z", "datePublished": "2026-10-13T12:29:30.787Z", "dateUpdated": "2026-10-13T18:17:15.720Z"}, "containers": {"cna": {"affected": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "153.5", "lessThanOrEqual": "153.*", "versionType": "rpm"}, {"status": "unaffected", "version": "158", "lessThanOrEqual": "*", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "153.5", "lessThanOrEqual": "153.*", "versionType": "rpm"}, {"status": "unaffected", "version": "158", "lessThanOrEqual": "*", "versionType": "rpm"}]}], "descriptions": [{"lang": "en", "value": "Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5."}]}], "title": "Site isolation issue in the Networking component", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2070252"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-106/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-108/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-109/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-110/"}], "credits": [{"lang": "en", "value": "Myungyong Lee"}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2026-10-13T18:17:15.720Z"}}}}

{}

{"affected": [{"affectedData": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "153.*", "status": "unaffected", "version": "153.5", "versionType": "rpm"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "158", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "153.*", "status": "unaffected", "version": "153.5", "versionType": "rpm"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "158", "versionType": "rpm"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5."}], "id": "CVE-2026-109759", "lastModified": "2026-10-13T19:18:40.063", "metrics": {}, "published": "2026-10-13T13:17:26.740", "references": [{"source": "[email protected]", "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2070252"}, {"source": "[email protected]", "url": "https://www.mozilla.org/security/advisories/mfsa2026-106/"}, {"source": "[email protected]", "url": "https://www.mozilla.org/security/advisories/mfsa2026-108/"}, {"source": "[email protected]", "url": "https://www.mozilla.org/security/advisories/mfsa2026-109/"}, {"source": "[email protected]", "url": "https://www.mozilla.org/security/advisories/mfsa2026-110/"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Deferred"}

{}

{"created": "2026-10-13T16:15:18.156874+00:00", "updated": "2026-10-13T16:15:18.156880+00:00", "vendors": [], "weaknesses": ["CWE-200"]}