CVE-2021-39168

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.

• CWE-269
• CWE-269

• https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/security/advisories/GHSA-vrw4-w73r-6mm8Third Party Advisory
• https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/CHANGELOG.md#431Patch, Release Notes, Third Party Advisory
• https://github.com/OpenZeppelin/openzeppelin-contracts/commit/cec4f2ef57495d8b1742d62846da212515d99dd5Patch, Third Party Advisory
• https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/security/advisories/GHSA-vrw4-w73r-6mm8Third Party Advisory
• https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/CHANGELOG.md#431Patch, Release Notes, Third Party Advisory
• https://github.com/OpenZeppelin/openzeppelin-contracts/commit/cec4f2ef57495d8b1742d62846da212515d99dd5Patch, Third Party Advisory

Published

Aug 27, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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