{"schema":"threatline.record/2","record":{"id":"CVE-2026-114663","aliases":["GHSA-2489-32vh-8rrc"],"summary":"Vyper 0.4.0b1 through 0.5.0b1 Name Shadowing of Imported Constants and Default Arguments","details":"Vyper 0.4.0b1 through 0.5.0b1 miscompiles unfoldable constants and omitted default arguments from imported modules, because parse_Name resolves their names in the using function's scope rather than at declaration. When a contract's parameter, local, or loop variable shares such a name, attacker-influenced input can replace the intended value, including out-of-range values for narrow types such as uint8, corrupting validation or accounting logic.","categories":["Unclassified"],"product":"vyper","vendor":"vyperlang","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-114663","source_modified_at":"2026-10-23T15:06:28.237Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"vyper","vendor":"vyperlang","versions":[{"version":"0.4.0b1","status":"affected","versionType":"python","lessThanOrEqual":"0.5.0b1"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.6,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00136,"percentile":0.0276,"score_date":"2026-10-23"},"published_at":"2026-10-22T01:43:46.942Z","modified_at":"2026-10-23T15:06:28.237Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-114663","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T15:06:28.237Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-114663","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-2489-32vh-8rrc","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/vyper-0.4-0b1-through-0.5-0b1-name-shadowing-of-imported-constants-and-default-arguments","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":"total","assessed_at":"2026-10-23T14:54:17.794694Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-23T15:06:28.237Z","content_hash":"26436747e5c842cd1417b97fd014d00c521a01cbc232168b4c18393097e4ae6b"}}