{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74941","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","state":"PUBLISHED","assignerShortName":"mozilla","dateReserved":"2026-08-17T11:57:39.938Z","datePublished":"2026-08-18T12:23:28.747Z","dateUpdated":"2026-08-21T03:55:37.006Z"},"containers":{"cna":{"affected":[{"product":"Firefox","vendor":"Mozilla","versions":[{"status":"unaffected","version":"140.14","lessThanOrEqual":"140.*","versionType":"rpm"},{"status":"unaffected","version":"153.1","lessThanOrEqual":"153.*","versionType":"rpm"},{"status":"unaffected","version":"154","lessThanOrEqual":"*","versionType":"rpm"}]},{"product":"Thunderbird","vendor":"Mozilla","versions":[{"status":"unaffected","version":"140.14","lessThanOrEqual":"140.*","versionType":"rpm"},{"status":"unaffected","version":"153.1","lessThanOrEqual":"153.*","versionType":"rpm"},{"status":"unaffected","version":"154","lessThanOrEqual":"*","versionType":"rpm"}]}],"descriptions":[{"lang":"en","value":"Privilege escalation in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.","supportingMedia":[{"type":"text/html","base64":false,"value":"Privilege escalation in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1."}]}],"title":"Privilege escalation in the Graphics: CanvasWebGL component","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2055056"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-74/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-76/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-77/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-78/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-79/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-80/"}],"credits":[{"lang":"en","value":"Jacolon Walker"}],"providerMetadata":{"orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","shortName":"mozilla","dateUpdated":"2026-08-18T18:55:00.779Z"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-269","lang":"en","description":"CWE-269 Improper Privilege Management"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":8.8,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-20T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-74941"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-21T03:55:37.006Z"}}]}}