npm/@openzeppelin/contracts CVE-2021-41264: critical 9.8, EPSS 1.49%

UUPSUpgradeable vulnerability in @openzeppelin/contracts

Action: Upgrade @openzeppelin/contracts to 4.3.2 or later.

npm i @openzeppelin/contracts@4.3.2

Affected

Fixed versions

Sources

• osv: GHSA-5vp3-v4hc-gx76
• https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-5vp3-v4hc-gx76
• https://nvd.nist.gov/vuln/detail/CVE-2021-41264
• https://github.com/OpenZeppelin/openzeppelin-contracts/commit/024cc50df478d2e8f78539819749e94d6df60592
• https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301
• https://github.com/OpenZeppelin/openzeppelin-contracts

CVE-2021-41264 · published 2021-09-15T20:23:17Z · modified 2026-07-08T06:27:43.429315395Z · JSON