{"id":"CVE-2026-12304","state":"PUBLISHED","title":"Same-origin policy bypass in the Networking: Cookies component","description":"Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.","publishedAt":"2026-06-16T11:52:37.817Z","updatedAt":"2026-06-16T18:55:05.212Z","severity":{"score":9.1,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","source":"CISA-ADP"},"assigner":"mozilla","products":["Mozilla Firefox","Mozilla Thunderbird"],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"140.12","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"152","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.12","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"152","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=2034944","https://www.mozilla.org/security/advisories/mfsa2026-57/","https://www.mozilla.org/security/advisories/mfsa2026-58/","https://www.mozilla.org/security/advisories/mfsa2026-60/","https://www.mozilla.org/security/advisories/mfsa2026-61/"],"weaknesses":["CWE-346"],"ingestedAt":"2026-10-29T20:10:52.580Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/12xxx/CVE-2026-12304.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-12304","state":"PUBLISHED","datePublished":"2026-06-16T11:52:37.817Z","dateUpdated":"2026-06-16T18:55:05.212Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2026-06-15T15:08:12.234Z"},"containers":{"cna":{"title":"Same-origin policy bypass in the Networking: Cookies component","descriptions":[{"lang":"en","value":"Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12."}],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"140.12","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"152","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.12","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"152","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2034944"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-57/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-58/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-60/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-61/"}],"providerMetadata":{"shortName":"mozilla","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateUpdated":"2026-06-16T16:08:31.961Z"},"credits":[{"lang":"en","value":"Yaqoub Aldurayhim"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.1,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-06-16T18:50:40.397101Z","id":"CVE-2026-12304","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-346","type":"CWE","lang":"en","description":"CWE-346 Origin Validation Error"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-16T18:55:05.212Z"}}]}}}