Quick answers
- Is This vulnerability exploited in the wild?
- No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.
- How severe is This vulnerability?
- High severity, published 25 September 2026.
- Which products and versions are affected?
- OpenZeppelin Contracts before v0.3.2, v0.4.2, v0.5.2.
- Is there a fix for This vulnerability?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is This vulnerability attacked?
- It is attacked over the network, in a software library.
- Am I affected?
- Check whether you run OpenZeppelin Contracts at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
VestingWalletConfidential and ERC7984 fail to verify that an external party has access control list (ACL) authorization before using encrypted handles returned by untrusted token contracts. A malicious ERC-7984 token can supply an alternative handle via confidentialBalanceOf, causing the vesting wallet to derive and grant access to private euint64 handles without validating the token's authorization; similarly, ERC7984 transfer callbacks can return unauthorized ebool values to leak plaintext via refund logic.
Affected products
- OpenZeppelin Contracts before v0.3.2, v0.4.2, v0.5.2
Timeline
- 2026-09-25: disclosed