CVE-2023-42460

Vyper is a Pythonic Smart Contract Language for the EVM. The `_abi_decode()` function does not validate input when it is nested in an expression. Uses of `_abi_decode()` can be constructed which allow for bounds checking to be bypassed resulting in incorrect results. This issue has not yet been fixed, but a fix is expected in release `0.3.10`. Users are advised to reference pull request #3626.

• CWE-682

• https://github.com/vyperlang/vyper/pull/3626Patch
• https://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97Exploit, Patch, Third Party Advisory
• https://github.com/vyperlang/vyper/pull/3626Patch
• https://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97Exploit, Patch, Third Party Advisory

Published

Sep 27, 2023

Last Modified

Jun 17, 2026

Status

Modified

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