{"id":"CVE-2020-37287","published":"2026-10-21T01:17:18.540","lastModified":"2026-10-22T17:00:33.203","description":"Vyper before 0.2.6 contains a call stack corruption vulnerability that causes incorrect function outputs when complex types with non-base members are passed as arguments. Contracts passing multi-dimensional arrays or structs to internal or external functions receive corrupted values because the compiler assumed each subtype size is 32.","cvssScore":5.9,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","cwes":["CWE-131"],"vendors":[],"products":[],"references":[{"url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-4v7v-gqf9-ww2g","tags":[]},{"url":"https://www.vulncheck.com/advisories/vyper-before-0.2.6-call-stack-corruption-via-complex-type-function-arguments","tags":[]}],"exploitRefs":[{"url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-4v7v-gqf9-ww2g","tags":[]}],"hasPoc":true,"ai":null}