CVE-2026-114663Vyper 0.4.0b1 through 0.5.0b1 Name Shadowing of Imported Constants and Default Arguments
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Vyper 0.4.0b1 through 0.5.0b1 miscompiles unfoldable constants and omitted default arguments from imported modules, because parse_Name resolves their names in the using function's scope rather than at declaration. When a contract's parameter, local, or loop variable shares such a name, attacker-influenced input can replace the intended value, including out-of-range values for narrow types such as uint8, corrupting validation or accounting logic.
- CVSS
- 8.4 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-706
- 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 22, 2026
- First seen by InfoSec Signals
- Oct 22, 2026
Affected products
vyperlang vyper vyperlang:vyper (from the name) | from 0.4.0b1 through 0.5.0b1 | CNA record |
References
- https://github.com/vyperlang/vyper/security/advisories/GHSA-2489-32vh-8rrcvendor-advisory
- https://www.vulncheck.com/advisories/vyper-0.4-0b1-through-0.5-0b1-name-shadowing-of-imported-constants-and-default-argumentsthird-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.