{"id":"CVE-2026-114118","aliases":[],"title":"Vyper 0.3.4 through 0.5.0b1 create_from_blueprint Offset Validation Bypass via Unsigned Wraparound","titleSource":"VulnCheck","descriptionSource":"VulnCheck","products":[{"vendor":"vyperlang","name":"vyper","platforms":[],"versions":[{"version":"0.3.4","status":"affected","lessThanOrEqual":"0.5.0b1","versionType":"python"}],"defaultStatus":"unaffected","source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-114118"}],"remediation":[],"description":"Vyper 0.3.4 through 0.5.0b1 computes the remaining blueprint size in create_from_blueprint by uint256 subtraction without first checking that code_offset is below the blueprint's code size, so a huge offset wraps to a small positive value. An attacker controlling code_offset can make a factory deploy contracts with no runtime code, potentially trapping ETH and tokens.","severity":"medium","score":6.3,"published":"2026-10-21T00:37:15.454Z","modified":"2026-10-27T21:58:34.645Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://github.com/vyperlang/vyper/security/advisories/GHSA-fxg7-4wqg-c8gh","https://www.vulncheck.com/advisories/vyper-0.3.4-through-0.5-0b1-create-from-blueprint-offset-validation-bypass-via-unsigned-wraparound"],"sources":[{"name":"CVE","id":"CVE-2026-114118","modified":"2026-10-27T21:58:34.645Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-114118"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","score":6.3},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L","score":4.8}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-29T01:20:34.987Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}