{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74934","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","state":"PUBLISHED","assignerShortName":"mozilla","dateReserved":"2026-08-17T11:57:25.126Z","datePublished":"2026-08-18T12:23:27.344Z","dateUpdated":"2026-08-21T20:09:50.955Z"},"containers":{"cna":{"affected":[{"product":"Firefox","vendor":"Mozilla","versions":[{"status":"unaffected","version":"115.39","lessThanOrEqual":"115.*","versionType":"rpm"},{"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":"Site isolation issue in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.","supportingMedia":[{"type":"text/html","base64":false,"value":"Site isolation issue in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1."}]}],"title":"Site isolation issue in the Graphics: CanvasWebGL component","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2050584"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-74/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-75/"},{"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":"satyamasd"}],"providerMetadata":{"orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","shortName":"mozilla","dateUpdated":"2026-08-18T18:54:55.765Z"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-200","lang":"en","description":"CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"}]},{"descriptions":[{"type":"CWE","cweId":"CWE-284","lang":"en","description":"CWE-284 Improper Access Control"}]},{"descriptions":[{"type":"CWE","cweId":"CWE-346","lang":"en","description":"CWE-346 Origin Validation Error"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"REQUIRED","attackComplexity":"HIGH","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-21T20:08:52.091241Z","id":"CVE-2026-74934","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-21T20:09:50.955Z"}}]}}