CVE-2026-114118Vyper 0.3.4 through 0.5.0b1 create_from_blueprint Offset Validation Bypass via Unsigned Wraparound
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
- Weakness (CWE)
- CWE-681
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Received
- Record last updated
- Oct 21, 2026
- First seen by InfoSec Signals
- Oct 21, 2026
Affected products
vyperlang vyper vyperlang:vyper (from the name) | from 0.3.4 through 0.5.0b1 | CNA record |
References
- https://github.com/vyperlang/vyper/security/advisories/GHSA-fxg7-4wqg-c8ghvendor-advisory
- https://www.vulncheck.com/advisories/vyper-0.3.4-through-0.5-0b1-create-from-blueprint-offset-validation-bypass-via-unsigned-wraparoundthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.