{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-16387", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "state": "PUBLISHED", "assignerShortName": "mozilla", "dateReserved": "2026-07-20T21:57:05.138Z", "datePublished": "2026-07-21T12:38:01.478Z", "dateUpdated": "2026-07-21T12:38:01.478Z"}, "containers": {"cna": {"affected": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "140.13", "lessThanOrEqual": "140.*", "versionType": "rpm"}, {"status": "unaffected", "version": "153", "lessThanOrEqual": "*", "versionType": "rpm"}]}], "descriptions": [{"lang": "en", "value": "Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 153 and Firefox ESR 140.13.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 153 and Firefox ESR 140.13."}]}], "title": "Site isolation issue in the Networking component", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2043200"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-68/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-70/"}], "credits": [{"lang": "en", "value": "Atsushi Sada"}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2026-07-21T12:38:01.478Z"}}}}

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