github.com
https://github.com/OpenZeppelin/openzeppelin-confidential-contracts CVE-2026-73645
MEDIUM
OpenZeppelin Confidential Contracts ERC7984ERC20Wrapper: once a wrapper is filled, subsequent wrap requests do not revert and result in loss of funds.
Record summary
CVE-2026-73645 has a selected CVSS score of 6.6 (medium).
Description
OpenZeppelin Confidential Contracts is an experimental library for developing applications on the Zama fhEVM. Prior to 0.3.1, the ERC7984 contract tracked confidential total supply with an euint64 value, and an overflowing internal _mint operation could fail silently. The wrap and onTransferReceived functions in contracts/token/ERC7984/extensions/ERC7984ERC20Wrapper.sol did not handle that failure, so a user could transfer the underlying token without receiving the corresponding confidential wrapped token. With the default rate(), the wrapper fills after approximately 18.4 trillion tokens, and subsequent wrapping requests can cause loss of funds. This issue is fixed in version 0.3.1.
Description source: CVE List
Affected products and versions
2| Product | Source | Version range | Status |
|---|---|---|---|
openzeppelin-confidential-contractsBrowse OpenZeppelin / openzeppelin-confidential-contracts | CVE List | < 0.3.1 | affected |
@openzeppelin/confidential-contractsBrowse npm / @openzeppelin/confidential-contracts | GitHub Advisory | Before 0.3.1 · Fixed in 0.3.1 | affected |
References
5github.com
https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/commit/c620d4386021dde63ae3ea1507dee8543791134a github.com
https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/pull/271 github.com
https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/releases/tag/v0.3.1 github.comConfirmation
https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/security/advisories/GHSA-hqf9-8xv5-x8xw