{"id":"CVE-2026-8949","state":"PUBLISHED","title":"Integer overflow in the Widget: Win32 component","description":"Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.","publishedAt":"2026-05-19T12:29:40.812Z","updatedAt":"2026-05-19T17:10:47.774Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"mozilla","products":["Mozilla Firefox","Mozilla Thunderbird"],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"140.11","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"151","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.11","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"151","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=1355639","https://www.mozilla.org/security/advisories/mfsa2026-46/","https://www.mozilla.org/security/advisories/mfsa2026-48/","https://www.mozilla.org/security/advisories/mfsa2026-50/","https://www.mozilla.org/security/advisories/mfsa2026-51/"],"weaknesses":["CWE-190"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/8xxx/CVE-2026-8949.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-8949","state":"PUBLISHED","datePublished":"2026-05-19T12:29:40.812Z","dateUpdated":"2026-05-19T17:10:47.774Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2026-05-19T12:29:40.080Z"},"containers":{"cna":{"title":"Integer overflow in the Widget: Win32 component","descriptions":[{"lang":"en","value":"Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11."}],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"140.11","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"151","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.11","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"151","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1355639"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-46/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-48/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-50/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-51/"}],"providerMetadata":{"shortName":"mozilla","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateUpdated":"2026-05-19T17:10:47.774Z"},"credits":[{"lang":"en","value":"q1"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-05-19T14:05:21.233477Z","id":"CVE-2026-8949","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","type":"CWE","lang":"en","description":"CWE-190 Integer Overflow or Wraparound"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-19T14:05:24.997Z"}}]}}}