{"cve":"CVE-2023-37902","nvd":{"published":"2023-07-25T21:15:10.550","modified":"2026-06-17T06:08:51.970","status":"Modified","description":"Vyper is a Pythonic programming language that targets the Ethereum Virtual Machine (EVM). Prior to version 0.3.10, the ecrecover precompile does not fill the output buffer if the signature does not verify. However, the ecrecover builtin will still return whatever is at memory location 0. This means that the if the compiler has been convinced to write to the 0 memory location with specially crafted data (generally, this can happen with a hashmap access or immutable read) just before the ecrecover, a signature check might pass on an invalid signature. Version 0.3.10 contains a patch for this issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},"cwes":["CWE-252"],"references":["https://github.com/vyperlang/vyper/commit/019a37ab98ff53f04fecfadf602b6cd5ac748f7f","https://github.com/vyperlang/vyper/security/advisories/GHSA-f5x6-7qgp-jhf3","https://github.com/vyperlang/vyper/commit/019a37ab98ff53f04fecfadf602b6cd5ac748f7f","https://github.com/vyperlang/vyper/security/advisories/GHSA-f5x6-7qgp-jhf3"],"products":["vyperlang:vyper"],"source":"nvd","synced_at":"2026-10-19T21:38:35.729974749+00:00"},"epss":{"cve":"CVE-2023-37902","score":0.00574,"percentile":0.47385,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-f5x6-7qgp-jhf3","url":"https://osv.dev/vulnerability/GHSA-f5x6-7qgp-jhf3","summary":"ecrecover can return undefined data if signature does not verify","modified":"2024-11-19T17:01:17.067007Z","packages":[{"ecosystem":"PyPI","name":"vyper","purl":"pkg:pypi/vyper","ranges":["<0.3.10"],"fixed":["0.3.10"]}]},{"id":"PYSEC-2023-133","url":"https://osv.dev/vulnerability/PYSEC-2023-133","summary":"","modified":"2023-11-08T04:13:03.946034Z","packages":[{"ecosystem":"PyPI","name":"vyper","purl":"pkg:pypi/vyper","ranges":["<0.3.9"],"fixed":["0.3.9"]}]}],"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."]}