{"id":"CVE-2026-2784","state":"PUBLISHED","title":"Mitigation bypass in the DOM: Security component","description":"Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.","publishedAt":"2026-02-24T13:33:17.554Z","updatedAt":"2026-04-16T14:32:57.551Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"mozilla","products":["Mozilla Firefox","Mozilla Thunderbird"],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"140.8","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"148","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.8","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"148","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=2012984","https://www.mozilla.org/security/advisories/mfsa2026-13/","https://www.mozilla.org/security/advisories/mfsa2026-15/","https://www.mozilla.org/security/advisories/mfsa2026-16/","https://www.mozilla.org/security/advisories/mfsa2026-17/"],"weaknesses":["CWE-288"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/2xxx/CVE-2026-2784.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-2784","state":"PUBLISHED","datePublished":"2026-02-24T13:33:17.554Z","dateUpdated":"2026-04-16T14:32:57.551Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2026-02-19T15:06:19.739Z"},"containers":{"cna":{"title":"Mitigation bypass in the DOM: Security component","descriptions":[{"lang":"en","value":"Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8."}],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"140.8","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"148","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.8","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"148","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2012984"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-13/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-15/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-16/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-17/"}],"providerMetadata":{"shortName":"mozilla","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateUpdated":"2026-04-13T13:53:34.499Z"},"credits":[{"lang":"en","value":"D. Santos"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-02-28T03:13:23.268966Z","id":"CVE-2026-2784","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-288","type":"CWE","lang":"en","description":"CWE-288 Authentication Bypass Using an Alternate Path or Channel"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-16T14:32:57.551Z"}}]}}}