{"id":"PYSEC-2024-164","details":"Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. If an excessively large value is specified as the starting index for an array in `_abi_decode`, it can cause the read position to overflow. This results in the decoding of values outside the intended array bounds, potentially leading to exploitations in contracts that use arrays within `_abi_decode`. This vulnerability affects 0.3.10 and earlier versions.","aliases":["CVE-2024-26149","GHSA-9p8r-4xp4-gw5w"],"modified":"2026-06-10T17:14:18.967761542Z","published":"2024-02-26T20:19:05Z","references":[{"type":"ADVISORY","url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-9p8r-4xp4-gw5w"},{"type":"EVIDENCE","url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-9p8r-4xp4-gw5w"},{"type":"FIX","url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-9p8r-4xp4-gw5w"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-9p8r-4xp4-gw5w"}],"affected":[{"package":{"name":"vyper","ecosystem":"PyPI","purl":"pkg:pypi/vyper"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.0b1"}]}],"versions":["0.1.0b1","0.1.0b10","0.1.0b11","0.1.0b12","0.1.0b13","0.1.0b14","0.1.0b15","0.1.0b16","0.1.0b17","0.1.0b2","0.1.0b3","0.1.0b4","0.1.0b5","0.1.0b6","0.1.0b7","0.1.0b8","0.1.0b9","0.2.1","0.2.10","0.2.11","0.2.12","0.2.13","0.2.14","0.2.15","0.2.16","0.2.2","0.2.3","0.2.4","0.2.5","0.2.6","0.2.7","0.2.8","0.2.9","0.3.0","0.3.1","0.3.10","0.3.10rc1","0.3.10rc2","0.3.10rc3","0.3.10rc4","0.3.10rc5","0.3.2","0.3.3","0.3.4","0.3.5","0.3.6","0.3.7","0.3.8","0.3.9"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/vyper/PYSEC-2024-164.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}