CVE-2023-49798

OpenZeppelin Contracts is a library for smart contract development. A merge issue when porting the 5.0.1 patch to the 4.9 branch caused a line duplication. In the version of `Multicall.sol` released in `@openzeppelin/contracts@4.9.4` and `@openzeppelin/contracts-upgradeable@4.9.4`, all subcalls are executed twice. Concretely, this exposes a user to unintentionally duplicate operations like asset transfers. The duplicated delegatecall was removed in version 4.9.5. The 4.9.4 version is marked as deprecated. Users are advised to upgrade. There are no known workarounds for this issue.

• CWE-670

• https://github.com/OpenZeppelin/openzeppelin-contracts/commit/88ac712e06832bce73b41e8166cded2729e25205Patch
• https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-699g-q6qh-q4v8Vendor Advisory
• https://github.com/OpenZeppelin/openzeppelin-contracts/commit/88ac712e06832bce73b41e8166cded2729e25205Patch
• https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-699g-q6qh-q4v8Vendor Advisory

Published

Dec 9, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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