# Ownable2Step is recommended over Ownable Low/Info · Three Sigma · RWA perpetuals DEX · 19th February, 2024 Finding 3S-OS-L9 of the Ostium security review. - Protocol: https://www.ostium.com/ - Report: /reports/ostium - Source: https://cdn.sanity.io/files/qoqld077/production/a95b9c69e0f65d1d6b0e649f0d62a362358ca8ce.pdf --- ### Description Ownable uses a dangerous pattern of setting the address without proper checks. This means that if a mistake is made and ownership is transferred to the wrong address, the owner functionalities would be forever lost. ### Recommendation [Ownable2Step](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable2Step.sol) eliminates this risk by using a 2 step pattern by setting a pending governor and having it accept ownership. ### Status Acknowledged --- Related findings: - [Ownable2Step should be preferred over Ownable](https://0xsimao.com/findings/metazero-i-ownable2-step-preferred-ownable): MetaZero Omnichain NFTs