{"schema":"threatline.record/2","record":{"id":"CVE-2026-110247","aliases":[],"summary":"Integer overflow in libmime buffer growth could lead to heap corruption","details":"Several buffer-growth sites in libmime performed size arithmetic in 32-bit types without overflow checks. On a sufficiently large message the growth guard could fail open, or the buffer could be reallocated smaller than required, and a subsequent memcpy would then write attacker-controlled data across adjacent heap allocations. This vulnerability was fixed in Thunderbird 158.","categories":["Unclassified"],"product":"Thunderbird","vendor":"Mozilla","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-110247","source_modified_at":"2026-10-21T17:25:34.486Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Thunderbird","vendor":"Mozilla","versions":[{"status":"unaffected","version":"158","lessThanOrEqual":"*","versionType":"rpm"}],"defaultStatus":null}],"fixed_versions":[],"cvss":8.4,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00152,"percentile":0.03988,"score_date":"2026-10-23"},"published_at":"2026-10-13T18:08:37.608Z","modified_at":"2026-10-21T17:25:34.486Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-110247","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-21T17:25:34.486Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-110247","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=2071621"},{"source":"CVE List","url":"https://www.mozilla.org/security/advisories/mfsa2026-109/"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-20T17:08:54.337976Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-21T17:25:34.486Z","content_hash":"cc7c6b63aff3d528375b8f32f2ccc6d6bb95ee5eea9e159bb6c6350fa0c17306"}}