TI-2021-17961 Aliases CVE-2021-41122 GHSA-c7pr-343r-5c46

Bounds check missing for decimal args in Vyper

LOW 22CWE-682Published 2021-10-05 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

Vyper is a Pythonic Smart Contract Language for the EVM. In affected versions external functions did not properly validate the bounds of decimal arguments. The can lead to logic errors. This issue has been resolved in version 0.3.0.

Why it matters now

EPSS 0.00803 56th percentileScored 2026-11-08

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed vyper (vyperlang): 0.3.0vyper (PyPI): 0.3.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
vyperlang	vyper	before 0.3.0	0.3.0	Patch available	CNA
—	vyper (PyPI)	before 0.3.0	0.3.0	Patch available	GHSA-c7pr-343r-5c46

vyper Vendorvyperlang Affected before 0.3.0 Fixed in 0.3.0 Patch available CNA
vyper (PyPI) Vendor— Affected before 0.3.0 Fixed in 0.3.0 Patch available GHSA-c7pr-343r-5c46

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:vyperlang:vyper::::::::	before 0.3.0	Vulnerable	vyperlang

cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:*:*:* Versions before 0.3.0 Vulnerable ·vyperlang

Remediation

Fix · CNA vyper (vyperlang) Fixed in 0.3.0
Fix · GHSA-c7pr-343r-5c46 vyper (PyPI) Fixed in 0.3.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2021-41122
2026-10-03 Alias added: GHSA-c7pr-343r-5c46

References

Exploit 1

https://github.com/vyperlang/vyper/security/advisories/GHSA-c7pr-343r-5c46

Advisory 2

Other 2

TI-2024-16182 Vyper bounds check on built-in `slice()` function can be overflowed CVSS 3.1CRITICAL 9.8
TI-2024-14992 concat built-in can corrupt memory in vyper CVSS 3.1CRITICAL 9.8
TI-2024-16184 Vyper array negative index vulnerability CVSS 3.1CRITICAL 9.8
TI-2022-08657 Integer bounds error in Vyper CVSS 3.1CRITICAL 9.8
TI-2022-11796 Multiple evaluation of contract address in call in vyper CVSS 3.1HIGH 8.2
TI-2024-21531 vyper performs double eval of the argument of sqrt CVSS 3.1MEDIUM 5.3

See all 37 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences