{"schema":"threatline.record/2","record":{"id":"CVE-2026-103500","aliases":[],"summary":"Heap buffer overflow opening large email","details":"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.","categories":["Unclassified"],"product":"Thunderbird","vendor":"Mozilla","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-103500","source_modified_at":"2026-10-21T17:24:51.272Z","fetched_at":"2026-10-23T18:42:43.628194Z","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"}],"defaultStatus":null}],"fixed_versions":[],"cvss":6.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00214,"percentile":0.11188,"score_date":"2026-10-23"},"published_at":"2026-09-30T17:15:06.357Z","modified_at":"2026-10-21T17:24:51.272Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-103500","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-21T17:24:51.272Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-103500","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2070267"},{"source":"CVE List","url":"https://www.mozilla.org/security/advisories/mfsa2026-101/"},{"source":"CVE List","url":"https://www.mozilla.org/security/advisories/mfsa2026-102/"},{"source":"CVE List","url":"https://www.mozilla.org/security/advisories/mfsa2026-103/"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-16T18:33:49.871087Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-21T17:24:51.272Z","content_hash":"be26fa4c5d3dd7fc04b6bf67a660ce7eb1388bd0423ef7e4909bfd57019cff25"}}