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TI-2024-21530 Aliases CVE-2024-32648GHSA-m2v9-w374-5hj9

vyper default functions don't respect nonreentrancy keys

Priority LOW 30CWE-667Published · Updated

Key facts

Attack vector
Network
Privileges required
None
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 Ethereum virtual machine. Prior to version 0.3.0, default functions don't respect nonreentrancy keys and the lock isn't emitted. No vulnerable production contracts were found. Additionally, using a lock on a `default` function is a very sparsely used pattern. As such, the impact is low. Version 0.3.0 contains a patch for the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00415 36th percentileScored 2026-11-07
Fix Fixed vyper (vyperlang): 0.3.0vyper (PyPI): 0.3.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
vyperlangvyperbefore 0.3.00.3.0Patch availableCNA
—vyper (PyPI)before 0.3.00.3.0Patch availableGHSA-m2v9-w374-5hj9
  • 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-m2v9-w374-5hj9

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:python:*:*before 0.3.0Vulnerablevyperlang
  • cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:python:*:* Versions before 0.3.0 Vulnerable ·vyperlang

Remediation

  • Fix · CNA vyper (vyperlang) Fixed in 0.3.0
  • Fix · GHSA-m2v9-w374-5hj9 vyper (PyPI) Fixed in 0.3.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-32648
  2. 2026-10-03 Alias added: GHSA-m2v9-w374-5hj9

References

Patch 1

Advisory 2

Other 3

  • 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