{"api_version":"1","generated_at":"2026-06-16T22:04:11+00:00","cve":"CVE-2026-12291","urls":{"html":"https://cve.report/CVE-2026-12291","api":"https://cve.report/api/cve/CVE-2026-12291.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-12291","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-12291"},"summary":{"title":"Use-after-free in the Networking: HTTP component","description":"Use-after-free in the Networking: HTTP component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.","state":"PUBLISHED","assigner":"mozilla","published_at":"2026-06-16 13:16:29","updated_at":"2026-06-16 17:16:32"},"problem_types":[],"metrics":[],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2036929","name":"https://bugzilla.mozilla.org/show_bug.cgi?id=2036929","refsource":"security@mozilla.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-58/","name":"https://www.mozilla.org/security/advisories/mfsa2026-58/","refsource":"security@mozilla.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-59/","name":"https://www.mozilla.org/security/advisories/mfsa2026-59/","refsource":"security@mozilla.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-57/","name":"https://www.mozilla.org/security/advisories/mfsa2026-57/","refsource":"security@mozilla.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-61/","name":"https://www.mozilla.org/security/advisories/mfsa2026-61/","refsource":"security@mozilla.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-60/","name":"https://www.mozilla.org/security/advisories/mfsa2026-60/","refsource":"security@mozilla.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-12291","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12291","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Mozilla","product":"Firefox","version":"unaffected 115.37 115.* rpm","platforms":[]},{"source":"CNA","vendor":"Mozilla","product":"Firefox","version":"unaffected 140.12 140.* rpm","platforms":[]},{"source":"CNA","vendor":"Mozilla","product":"Firefox","version":"unaffected 152 * rpm","platforms":[]},{"source":"CNA","vendor":"Mozilla","product":"Thunderbird","version":"unaffected 140.12 140.* rpm","platforms":[]},{"source":"CNA","vendor":"Mozilla","product":"Thunderbird","version":"unaffected 152 * rpm","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"Zijie Zhao","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"Firefox","vendor":"Mozilla","versions":[{"lessThanOrEqual":"115.*","status":"unaffected","version":"115.37","versionType":"rpm"},{"lessThanOrEqual":"140.*","status":"unaffected","version":"140.12","versionType":"rpm"},{"lessThanOrEqual":"*","status":"unaffected","version":"152","versionType":"rpm"}]},{"product":"Thunderbird","vendor":"Mozilla","versions":[{"lessThanOrEqual":"140.*","status":"unaffected","version":"140.12","versionType":"rpm"},{"lessThanOrEqual":"*","status":"unaffected","version":"152","versionType":"rpm"}]}],"credits":[{"lang":"en","value":"Zijie Zhao"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Use-after-free in the Networking: HTTP component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12."}],"value":"Use-after-free in the Networking: HTTP component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12."}],"providerMetadata":{"dateUpdated":"2026-06-16T16:08:24.979Z","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","shortName":"mozilla"},"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2036929"},{"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/mfsa2026-59/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-60/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-61/"}],"title":"Use-after-free in the Networking: HTTP component"}},"cveMetadata":{"assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","assignerShortName":"mozilla","cveId":"CVE-2026-12291","datePublished":"2026-06-16T11:52:24.990Z","dateReserved":"2026-06-15T15:08:06.495Z","dateUpdated":"2026-06-16T16:08:24.979Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-16 13:16:29","lastModifiedDate":"2026-06-16 17:16:32","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"12291","Ordinal":"1","Title":"Use-after-free in the Networking: HTTP component","CVE":"CVE-2026-12291","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"12291","Ordinal":"1","NoteData":"Use-after-free in the Networking: HTTP component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.","Type":"Description","Title":"Use-after-free in the Networking: HTTP component"}]}}}