OpenZeppelin Contracts's ERC165Checker may revert instead of returning false
Impact
ERC165Checker.supportsInterface is designed to always successfully return a boolean, and under no circumstance 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-165 as expected, specifically if it returns a value other than 0 or 1.
The contracts that may be affected are those that use ERC165Checker to check for support for an interface and then handle the lack of support in a way other than reverting.
Patches
The issue was patched in 4.7.1.
References
https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3552
For more information
If you have any questions or comments about this advisory, or need assistance deploying the fix, email us at security@openzeppelin.com.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @openzeppelin/contracts | >= 4.0.0, < 4.7.1 | 4.7.1 |
| npm package | @openzeppelin/contracts-upgradeable | >= 4.0.0, < 4.7.1 | 4.7.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N- Weakness (CWE)
CWE-20, CWE-252- Platform
- npm
- Package
@openzeppelin/contracts, @openzeppelin/contracts-upgradeable- Disclosed
- 21.07.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-qh9x-gcfh-pcrw - CC BY 4.0
Vulnerability history: @openzeppelin/contracts
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 20
- First → latest
- 08.2021 07.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- High 5
- Medium 12
- Low 1
Disclosures per year
- 2021: 4
- 2022: 7
- 2023: 7
- 2024: 1
- 2025: 1
- 2026: 0
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OpenZeppelin Contracts's ERC165Checker may revert instead of returning false this entry
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