PyPI: vyper

CVE-2023-37902

Safety vulnerability ID: SFTY-20230725-82514

Safety legacy ID: pyup.io-59955

Vyper 0.3.10 includes a fix for a vulnerability. Prior to version 0.3.10, the ecrecover precompile does not fill the output buffer if the signature does not verify. However, the ecrecover builtin will still return whatever is at memory location 0. This means that if the compiler has been convinced to write to the 0 memory location with specially crafted data, just before the ecrecover, a signature check might pass on an invalid signature. https://github.com/vyperlang/vyper/commit/019a37ab98ff53f04fecfadf602b6cd5ac748f7f https://github.com/vyperlang/vyper/security/advisories/GHSA-f5x6-7qgp-jhf3

PythonPyPINVDNVDGitHubGHSA
Created at: Jul 5, 2026Updated at: Jul 5, 2026

Overview

ecrecover can return undefined data if signature does not verify

Advisory

Vyper 0.3.10 includes a fix for a vulnerability. Prior to version 0.3.10, the ecrecover precompile does not fill the output buffer if the signature does not verify. However, the ecrecover builtin will still return whatever is at memory location 0. This means that if the compiler has been convinced to write to the 0 memory location with specially crafted data, just before the ecrecover, a signature check might pass on an invalid signature. https://github.com/vyperlang/vyper/commit/019a37ab98ff53f04fecfadf602b6cd5ac748f7f https://github.com/vyperlang/vyper/security/advisories/GHSA-f5x6-7qgp-jhf3

Affected Package

Affecting vyper package, versions<=0.3.9

Also affects

---

How to Fix

Upgradevyperto0.3.10rc1or higher.

Mitigation and Workarounds

---

Vulnerable Functions

Functions linked to known vulnerabilities.

Vulnerable function data is available for Enterprise customers

Book a call with us to see Safety in action.

References

Safety

Verified by Safety

Our Cybersecurity Intelligence Team reviewed this vulnerability. We combine public data with our own research to find issues not yet reported to public sources.

Learn more