{"id":"CVE-2021-48018","published":"2026-10-21T01:17:18.983","lastModified":"2026-10-23T15:17:20.357","description":"Vyper from 0.2.13 before 0.2.15 allocates storage slots for @nonreentrant reentrancy locks at the same locations as contract storage variables. When a function using @nonreentrant is called, setting the lock overwrites the overlapping storage variable, corrupting contract state and breaking the contract's intended logic.","cvssScore":7.4,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H","cwes":["CWE-787"],"vendors":[],"products":[],"references":[{"url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-7f92-rr6w-cq64","tags":[]},{"url":"https://www.vulncheck.com/advisories/vyper-0.2.13-before-0.2.15-storage-corruption-via-nonreentrant-decorator","tags":[]}],"exploitRefs":[{"url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-7f92-rr6w-cq64","tags":[]}],"hasPoc":true,"ai":null}