Critical severity10.0NVD Advisory· Published Aug 27, 2021· Updated Jun 17, 2026
CVE-2021-39167
CVE-2021-39167
Description
OpenZepplin is a library for smart contract development. In affected versions a vulnerability in TimelockController allowed an actor with the executor role to escalate privileges. Further details about the vulnerability will be disclosed at a later date. As a workaround revoke the executor role from accounts not strictly under the team's control. We recommend revoking all executors that are not also proposers. When applying this mitigation, ensure there is at least one proposer and executor remaining.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
@openzeppelin/contractsnpm | >= 4.0.0, < 4.3.1 | 4.3.1 |
@openzeppelin/contractsnpm | >= 3.3.0, < 3.4.2 | 3.4.2 |
Affected products
3>=4.0.0, < 4.3.1+ 1 more
- (no CPE)range: >=4.0.0, < 4.3.1
- cpe:2.3:a:openzeppelin:contracts:*:*:*:*:*:node.js:*:*range: >=3.3.0,<3.4.2
Patches
Vulnerability mechanics
References
5- github.com/OpenZeppelin/openzeppelin-contracts/blob/master/CHANGELOG.mdnvdPatchRelease NotesThird Party AdvisoryWEB
- github.com/OpenZeppelin/openzeppelin-contracts/commit/cec4f2ef57495d8b1742d62846da212515d99dd5nvdPatchThird Party AdvisoryWEB
- github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-fg47-3c2x-m2wrnvdThird Party AdvisoryWEB
- github.com/advisories/GHSA-fg47-3c2x-m2wrghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-39167ghsaADVISORY
News mentions
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