{"schema":"threatline.record/2","record":{"id":"CVE-2026-114115","aliases":["GHSA-cw3h-xwxq-8cx2"],"summary":"Vyper 0.3.8 through 0.5.0b1 Memory Misread via Ternary Nested Array Selection","details":"Vyper 0.3.8 through 0.5.0b1 contains a compiler miscompilation vulnerability in parse_IfExp that reads nested arrays with narrower inner bounds using the wider result type's memory layout. When a ternary selects the narrower array, inner arrays after the first are read at wrong offsets, causing contracts to silently store corrupted values or revert.","categories":["Unclassified"],"product":"vyper","vendor":"vyperlang","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-114115","source_modified_at":"2026-10-21T15:49:19.495Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"vyper","vendor":"vyperlang","versions":[{"version":"0.3.8","status":"affected","versionType":"python","lessThanOrEqual":"0.5.0b1"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":6.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00221,"percentile":0.12025,"score_date":"2026-10-23"},"published_at":"2026-10-21T00:37:13.251Z","modified_at":"2026-10-21T15:49:19.495Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-114115","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T15:49:19.495Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-114115","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-cw3h-xwxq-8cx2","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://github.com/vyperlang/vyper/commit/1fb7dfe2","tags":["patch"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/vyper-0.3.8-through-0.5-0b1-memory-misread-via-ternary-nested-array-selection","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-21T14:59:59.643585Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-21T15:49:19.495Z","content_hash":"189faff5944b01d27e658ef5eed89e337997b6568353f87a9e0d876048b55934"}}