CVE-2022-29255

Name: CVE-2022-29255
Creator: NVD / NIST
Published: 2022-06-09T09:15:08.377+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.21%

Last modified Jun 17, 2026

CVE-2022-29255 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Vyper is a Pythonic Smart Contract Language for the ethereum virtual machine. In versions prior to 0.3.4 when a calling an external contract with no return value, the contract address (including side effects) could be evaluated twice. EPSS estimates a 1.21% chance of exploitation in the next 30 days.

Description

Vyper is a Pythonic Smart Contract Language for the ethereum virtual machine. In versions prior to 0.3.4 when a calling an external contract with no return value, the contract address (including side effects) could be evaluated twice. This may result in incorrect outcomes for contracts. This issue has been addressed in v0.3.4.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

1.21%

64.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Vyperlang	Vyper	< 0.3.4

References

https://github.com/vyperlang/vyper/commit/6b4d8ff185de071252feaa1c319712b2d6577f8dPatch, Third Party Advisory
https://github.com/vyperlang/vyper/security/advisories/GHSA-4v9q-cgpw-cf38Exploit, Mitigation, Third Party Advisory
https://github.com/vyperlang/vyper/commit/6b4d8ff185de071252feaa1c319712b2d6577f8dPatch, Third Party Advisory
https://github.com/vyperlang/vyper/security/advisories/GHSA-4v9q-cgpw-cf38Exploit, Mitigation, Third Party Advisory

Timeline

Published: Jun 9, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-29255?

How severe is CVE-2022-29255?

CVE-2022-29255 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.21% probability of exploitation in the next 30 days.

How do I fix CVE-2022-29255?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-29255?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST