GHSA-q4h9-46xg-m3x9
UUPSUpgradeable vulnerability in @openzeppelin/contracts-upgradeable
GHSA-q4h9-46xg-m3x9 is a vulnerability with no CVSS score yet in @openzeppelin/contracts-upgradeable, published September 15, 2021. No source lists public exploit code. Fixed in @openzeppelin/contracts-upgradeable 4.3.2.
- Severity
- UnratedNo CVSS score yet
- Exploit chance
- UnscoredNo EPSS score yet
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
4.3.2@openzeppelin/contracts-upgradeable
Description
Impact
Upgradeable contracts using UUPSUpgradeable may be vulnerable to an attack affecting uninitialized implementation contracts. We will update this advisory with more information soon.
Patches
A fix is included in version 4.3.2 of @openzeppelin/contracts and @openzeppelin/contracts-upgradeable.
Workarounds
Initialize implementation contracts using UUPSUpgradeable by invoking the initializer function (usually called initialize). An example is provided in the forum.
References
A post-mortem will be published in a few days in the OpenZeppelin Forum.
For more information
If you have any questions or comments about this advisory, or need assistance executing the mitigation, email us at security@openzeppelin.com.
Affected packages
| Package | Affected | Fixed |
|---|---|---|
@openzeppelin/contracts-upgradeablenpm | 4.1.0 up to 4.3.2 | 4.3.2 |
What each source reports
GitHub AdvisoriesNo score
UUPSUpgradeable vulnerability in @openzeppelin/contracts-upgradeable
Impact
Upgradeable contracts using UUPSUpgradeable may be vulnerable to an attack affecting uninitialized implementation contracts. We will update this advisory with more information soon.
Patches
A fix is included in version 4.3.2 of @openzeppelin/contracts and @openzeppelin/contracts-upgradeable.
Workarounds
Initialize implementation contracts using UUPSUpgradeable by invoking the initializer function (usually called initialize). An example is provided in the forum.
References
A post-mortem will be published in a few days in the OpenZeppelin Forum.
For more information
If you have any questions or comments about this advisory, or need assistance executing the mitigation, email us at security@openzeppelin.com.
- Record
GHSA-q4h9-46xg-m3x9- Updated
- 2026-11-02
OSVNo score
UUPSUpgradeable vulnerability in @openzeppelin/contracts-upgradeable
Impact
Upgradeable contracts using UUPSUpgradeable may be vulnerable to an attack affecting uninitialized implementation contracts. We will update this advisory with more information soon.
Patches
A fix is included in version 4.3.2 of @openzeppelin/contracts and @openzeppelin/contracts-upgradeable.
Workarounds
Initialize implementation contracts using UUPSUpgradeable by invoking the initializer function (usually called initialize). An example is provided in the forum.
References
A post-mortem will be published in a few days in the OpenZeppelin Forum.
For more information
If you have any questions or comments about this advisory, or need assistance executing the mitigation, email us at security@openzeppelin.com.
- Record
GHSA-q4h9-46xg-m3x9- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.