Meta Pool, a multi-chain asset-staking protocol, experienced a security exploit caused by a critical bug in its staking smart contract. This vulnerability enabled an attacker to mint 9,700 mpETH tokens, worth approximately $27 million, without staking the underlying ETH. However, the exploit's impact was limited due to the lack of liquidity of mpETH tokens. The incident highlights the risks associated with smart contract vulnerabilities in decentralized finance protocols.