| Package | Affected versions | Patched versions |
|---|---|---|
| @openzeppelin/contracts-upgradeable | ≥ 4.1.0, < 4.3.2 | 4.3.2 |
Upgradeable contracts using UUPSUpgradeable may be vulnerable to an attack affecting uninitialized implementation contracts. We will update this advisory with more information soon.
A fix is included in version 4.3.2 of @openzeppelin/contracts and @openzeppelin/contracts-upgradeable.
Initialize implementation contracts using UUPSUpgradeable by invoking the initializer function (usually called initialize). An example is provided in the forum.
A post-mortem will be published in a few days in the OpenZeppelin Forum.
If you have any questions or comments about this advisory, or need assistance executing the mitigation, email us at [email protected].
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