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.
Metrics
Affected Vendors & Products
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Fixes
Solution
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Workaround
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References
History
Thu, 22 Oct 2026 02:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Vyper 0.4.0b1 through 0.5.0b1 Name Shadowing of Imported Constants and Default Arguments | |
| First Time appeared |
Vyperlang
Vyperlang vyper |
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| Weaknesses | CWE-706 | |
| CPEs | cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Vyperlang
Vyperlang vyper |
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| References |
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| Metrics |
cvssV3_1
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Projects
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-10-22T01:43:46.942Z
Reserved: 2026-10-21T21:59:05.257Z
Link: CVE-2026-114663
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-10-22T02:16:58.603
Modified: 2026-10-22T02:16:58.603
Link: CVE-2026-114663
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses