The smart contract vulnerability arises after the integration of ERC-2771 and Multicall standards. OpenZepplin identified 13 sets of vulnerable smart contracts.
![](https://wecoachcrypto.com/wp-content/uploads/2023/12/840_aHR0cHM6Ly9zMy5jb2ludGVsZWdyYXBoLmNvbS91cGxvYWRzLzIwMjMtMTIvZmMyNjE3YWMtNzI0Yy00NDllLTkxNjktN2IxMWVjY2M2ZmQ1LmpwZw-SXYVIh.jpeg)
The smart contract vulnerability arises after the integration of ERC-2771 and Multicall standards. OpenZepplin identified 13 sets of vulnerable smart contracts.