CVE-2022-31172: Openzeppelin Contracts

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

OpenZeppelin Contracts is a library for smart contract development. Versions 4.1.0 until 4.7.1 are vulnerable to the SignatureChecker reverting. `SignatureChecker.isValidSignatureNow` is not expected to revert. However, an incorrect assumption about Solidity 0.8's `abi.decode` allows some cases to revert, given a target contract that doesn't implement EIP-1271 as expected. The contracts that may be affected are those that use `SignatureChecker` to check the validity of a signature and handle invalid signatures in a way other than reverting. The issue was patched in version 4.7.1.

Affected products

• Openzeppelin Contracts: from 4.1.0, before 4.7.1 (fixed in 4.7.1)

Published 2022-07-22. Last modified 2026-06-17.