{"cve":"CVE-2022-29255","nvd":{"published":"2022-06-09T09:15:08.377","modified":"2026-06-17T04:39:55.853","status":"Modified","description":"Vyper is a Pythonic Smart Contract Language for the ethereum virtual machine. In versions prior to 0.3.4 when a calling an external contract with no return value, the contract address (including side effects) could be evaluated twice. This may result in incorrect outcomes for contracts. This issue has been addressed in v0.3.4.","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:H/A:N","score":7.5},"cwes":["CWE-670"],"references":["https://github.com/vyperlang/vyper/commit/6b4d8ff185de071252feaa1c319712b2d6577f8d","https://github.com/vyperlang/vyper/security/advisories/GHSA-4v9q-cgpw-cf38","https://github.com/vyperlang/vyper/commit/6b4d8ff185de071252feaa1c319712b2d6577f8d","https://github.com/vyperlang/vyper/security/advisories/GHSA-4v9q-cgpw-cf38"],"products":["vyperlang:vyper"],"source":"nvd","synced_at":"2026-10-19T21:32:39.174919249+00:00"},"epss":{"cve":"CVE-2022-29255","score":0.01349,"percentile":0.71486,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-4v9q-cgpw-cf38","url":"https://osv.dev/vulnerability/GHSA-4v9q-cgpw-cf38","summary":"Multiple evaluation of contract address in call in vyper","modified":"2024-11-19T16:22:12.941090Z","packages":[{"ecosystem":"PyPI","name":"vyper","purl":"pkg:pypi/vyper","ranges":["<0.3.4"],"fixed":["0.3.4"]}]},{"id":"PYSEC-2022-43053","url":"https://osv.dev/vulnerability/PYSEC-2022-43053","summary":"","modified":"2023-11-08T04:09:12.537261Z","packages":[{"ecosystem":"PyPI","name":"vyper","purl":"pkg:pypi/vyper","ranges":["<0.3.4"],"fixed":["0.3.4"]}]}],"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."]}