CVE-2026-73645 | BDVDB-2026-359144 Detail
OpenZeppelinopenzeppelin-confidential-contracts
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.
Impact#
Per CVSS v4.0: confidentiality impact none, integrity impact high, availability impact none. Attack vector: network.
Weaknesses#
- CWE-190 Integer Overflow or Wraparound
References#
- https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/security/advisories/GHSA-hqf9-8xv5-x8xw
- https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/pull/271
- https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/commit/c620d4386021dde63ae3ea1507dee8543791134a
- https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/releases/tag/v0.3.1
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.