While the protocol has open up-resource code and it has passed through audits, this is not at all foolproof. Having said that, Rocket Pool also contains a bug bounty plan to reduce this kind of hazards. rETH:ETH ratio https://dev.to/cleopatramorris_d539d19ea/rocket-pool-the-future-of-decentralized-ethereum-stakingintroduction-1m2b