{"id":"CVE-2026-92030","title":"Mitigation bypass in the DOM: Copy & Paste and Drag & Drop component","summary":"Mitigation bypass in the DOM: Copy & Paste and Drag & Drop component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","cwe":["CWE-693","CWE-807"],"vendor":"Mozilla","product":"Firefox","affected":["Firefox","Thunderbird"],"published":"2026-09-15","updated":"2026-09-21","sourceUpdated":"2026-09-21T17:19:16.033","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92030","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2058417","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-92/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-94/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-95/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-96/","label":"security@mozilla.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92030.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-92030"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533791"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92030"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92030"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-92/#CVE-2026-92030"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-95/#CVE-2026-92030"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-21T16:50:25.286973Z"},"epss":0.00164,"epssPercentile":0.06014,"scores":{"nvd":5.4,"vendor":6.1},"ingestedAt":"2026-09-15T12:36:50.190Z","slug":"CVE-2026-92030","body":"## Overview\n\nMitigation bypass in the DOM: Copy & Paste and Drag & Drop component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, … · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92030.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":208609,"id":"CVE-2026-92030","ts":1790013028541,"field":"cvss","old":"6.1","new":"5.4"},{"seq":206387,"id":"CVE-2026-92030","ts":1789663223972,"field":"cvss","old":null,"new":"6.1"},{"seq":206386,"id":"CVE-2026-92030","ts":1789663223972,"field":"severity","old":"none","new":"medium"}]}