MetaMask is proactively exiting about 17,000 Ethereum validators holding roughly 523,000 ETH after identifying a security incident affecting part of its infrastructure. The validators are operated by its staking business, formerly known as Consensys Staking, within the Lido protocol. MetaMask said it found no indication that its wallets or customer funds were affected, and emphasized that its non-custodial staking operations do not hold withdrawal keys for clients’ ETH. Lido said the final validators are expected to exit by the end of October 7, with the ETH returning to the protocol gradually over roughly 45 days as validators complete exit, withdrawal and re-entry. No action is required from stETH holders. Researchers separately estimated that about 0.36 ETH in rewards flowed to another address. MetaMask has not disclosed whether the compromise involved its systems, Lido’s infrastructure or a third-party vendor, and an investigation with external security advisers remains underway.