{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-109740","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","state":"PUBLISHED","assignerShortName":"mozilla","dateReserved":"2026-10-13T00:29:46.134Z","datePublished":"2026-10-13T12:29:26.143Z","dateUpdated":"2026-10-19T11:52:04.550Z"},"containers":{"cna":{"affected":[{"product":"Firefox","vendor":"Mozilla","versions":[{"status":"unaffected","version":"153.5","lessThanOrEqual":"153.*","versionType":"rpm"},{"status":"unaffected","version":"158","lessThanOrEqual":"*","versionType":"rpm"}]},{"product":"Thunderbird","vendor":"Mozilla","versions":[{"status":"unaffected","version":"153.5","lessThanOrEqual":"153.*","versionType":"rpm"},{"status":"unaffected","version":"158","lessThanOrEqual":"*","versionType":"rpm"}]}],"descriptions":[{"lang":"en","value":"Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.","supportingMedia":[{"type":"text/html","base64":false,"value":"Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5."}]}],"title":"Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2057113"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-109/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-110/"}],"credits":[{"lang":"en","value":"Mozilla"}],"providerMetadata":{"orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","shortName":"mozilla","dateUpdated":"2026-10-13T18:17:03.396Z"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-119","lang":"en","description":"CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer"}]}],"metrics":[{"cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":9.6,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-10-19T11:51:05.678002Z","id":"CVE-2026-109740","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":"2026-10-19T11:52:04.550Z"}}]}}