{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-103500","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","state":"PUBLISHED","assignerShortName":"mozilla","dateReserved":"2026-09-30T17:15:06.146Z","datePublished":"2026-09-30T17:15:06.357Z","dateUpdated":"2026-09-30T17:19:56.134Z"},"containers":{"cna":{"affected":[{"product":"Thunderbird","vendor":"Mozilla","versions":[{"status":"unaffected","version":"140.17","lessThanOrEqual":"140.*","versionType":"rpm"},{"status":"unaffected","version":"153.4","lessThanOrEqual":"153.*","versionType":"rpm"},{"status":"unaffected","version":"157","lessThanOrEqual":"*","versionType":"rpm"}]}],"descriptions":[{"lang":"en","value":"An attacker could cause a heap buffer overflow by getting a user to open an email that is greater than or equal to 2GB in size. This vulnerability was fixed in Thunderbird 157, Thunderbird 140.17, and Thunderbird 153.4.","supportingMedia":[{"type":"text/html","base64":false,"value":"An attacker could cause a heap buffer overflow by getting a user to open an email that is greater than or equal to 2GB in size. This vulnerability was fixed in Thunderbird 157, Thunderbird 140.17, and Thunderbird 153.4."}]}],"title":"Heap buffer overflow opening large email","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2070267"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-101/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-102/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-103/"}],"credits":[{"lang":"en","value":"Ahmed Albalawi"}],"providerMetadata":{"orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","shortName":"mozilla","dateUpdated":"2026-09-30T17:19:56.134Z"}}}}