{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-117976", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "state": "PUBLISHED", "assignerShortName": "mozilla", "dateReserved": "2026-10-27T14:05:45.966Z", "datePublished": "2026-10-27T14:05:46.140Z", "dateUpdated": "2026-10-27T14:37:14.415Z"}, "containers": {"cna": {"affected": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "153.6", "lessThanOrEqual": "153.*", "versionType": "rpm"}, {"status": "unaffected", "version": "159", "lessThanOrEqual": "*", "versionType": "rpm"}]}], "descriptions": [{"lang": "en", "value": "Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6."}]}], "title": "Site isolation issue in the DOM: Navigation component", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2076816"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-118/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-120/"}], "credits": [{"lang": "en", "value": "Shu Takahashi of Velcore Consulting Inc."}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2026-10-27T14:37:14.415Z"}}}}

{}

{"affected": [{"affectedData": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "153.*", "status": "unaffected", "version": "153.6", "versionType": "rpm"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "159", "versionType": "rpm"}]}], "source": "security@mozilla.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6."}], "id": "CVE-2026-117976", "lastModified": "2026-10-27T15:00:49.240", "metrics": {}, "published": "2026-10-27T14:16:55.540", "references": [{"source": "security@mozilla.org", "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2076816"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-118/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-120/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Deferred"}

{}

{}