{"cve":"CVE-2020-37286","nvd":{"published":"2026-10-21T01:17:18.010","modified":"2026-10-22T17:00:33.203","status":"Deferred","description":"Vyper from 0.1.0b4 before 0.3.0 contains a memory corruption vulnerability caused by an incorrect stack tip pointer when internal function calls appear inside tuples or nested calls. Contracts using such calls as tuple elements, call arguments, or builtin arguments like concat or ecrecover can return corrupted values or pass wrong arguments to external calls.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","score":8.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L","score":6.5},"cwes":["CWE-787"],"references":["https://github.com/vyperlang/vyper/security/advisories/GHSA-2r3x-4mrv-mcxf","https://www.vulncheck.com/advisories/vyper-0.1-0b4-before-0.3.0-memory-corruption-via-nested-internal-function-calls"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2020-37286","score":0.00284,"percentile":0.20722,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-2r3x-4mrv-mcxf","url":"https://osv.dev/vulnerability/GHSA-2r3x-4mrv-mcxf","summary":"Vyper: Memory corruption using function calls within tuples / nested calls","modified":"2026-10-24T02:56:14.247608932Z","packages":[{"ecosystem":"PyPI","name":"vyper","purl":"pkg:pypi/vyper","ranges":["<0.2.6"],"fixed":["0.2.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}