{"cve":"CVE-2024-32646","nvd":{"published":"2024-04-25T18:15:08.780","modified":"2026-06-17T07:30:01.380","status":"Analyzed","description":"Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, using the `slice` builtin can result in a double eval vulnerability when the buffer argument is either `msg.data`, `self.code` or `<address>.code` and either the `start` or `length` arguments have side-effects. It can be easily triggered only with the versions `<0.3.4` as `0.3.4` introduced the unique symbol fence. No vulnerable production contracts were found. Additionally, double evaluation of side-effects should be easily discoverable in client tests. As such, the impact is low. As of time of publication, no fixed versions are available.","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-20"],"references":["https://github.com/vyperlang/vyper/security/advisories/GHSA-r56x-j438-vw5m","https://github.com/vyperlang/vyper/security/advisories/GHSA-r56x-j438-vw5m"],"products":["vyperlang:vyper"],"source":"nvd","synced_at":"2026-10-19T21:49:08.435428910+00:00"},"epss":{"cve":"CVE-2024-32646","score":0.00455,"percentile":0.3953,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-r56x-j438-vw5m","url":"https://osv.dev/vulnerability/GHSA-r56x-j438-vw5m","summary":"vyper performs double eval of the slice start/length args in certain cases","modified":"2026-06-10T17:14:18.137937779Z","packages":[{"ecosystem":"PyPI","name":"vyper","purl":"pkg:pypi/vyper","ranges":["<0.4.0"],"fixed":["0.4.0"]}]},{"id":"PYSEC-2024-207","url":"https://osv.dev/vulnerability/PYSEC-2024-207","summary":"","modified":"2026-06-10T17:14:16.953105766Z","packages":[{"ecosystem":"PyPI","name":"vyper","purl":"pkg:pypi/vyper","ranges":["<0.4.0"],"fixed":["0.4.0"]}]}],"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."]}