{"id":"CVE-2026-117976","aliases":[],"title":"Site isolation issue in the DOM: Navigation component","description":"Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.","severity":"unknown","score":null,"published":"2026-10-27T14:05:46.140Z","modified":"2026-10-27T18:30:02.000Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=2076816","https://www.mozilla.org/security/advisories/mfsa2026-118/","https://www.mozilla.org/security/advisories/mfsa2026-120/","https://www.mozilla.org/security/advisories/mfsa2026-121/","https://www.mozilla.org/security/advisories/mfsa2026-122/"],"sources":[{"name":"CVE","id":"CVE-2026-117976","modified":"2026-10-27T18:30:02.000Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-117976"}],"assessments":[]}