0x flags Uniswap v4 hook security gaps after review of 84,163 contracts across six chains
0x said Uniswap v4 hooks pose significant security risks, after analyzing 84,163 hooks across six chains. It classified 19.4% as safe, while 54.2% were labeled malicious and 26.4% likely malicious. The external contracts can alter pool fees, pricing and execution logic, and the dataset recorded 6,516 fills and 3,946 fee charges—highlighting systemic risks when DeFi protocols depend on outside components.