Vulnerability in Vyperlang Vyper
CVE-2026-114118
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.
Published .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/vyperlang/vyper/security/advisories/GHSA-fxg7-4wqg-c8gh (vendor-advisory)
- www.vulncheck.com/advisories/vyper-0.3.4-through-0.5-0b1-create-from-blueprint-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-114118?
- CVE-2026-114118 is a medium-severity vulnerability in Vyperlang Vyper, classified under Incorrect Conversion between Numeric Types. CVSS score: 4.8/10. Published 2026-10-21.
- How severe is CVE-2026-114118?
- Medium severity. CVSS v3 base score is 4.8 out of 10.