On October 22, Uniswap Labs launched its aggregator Hooks on Ethereum, Base, and Robinhood Chain, allowing its web application and API to route trades through external liquidity sources such as Curve, Fluid, and PancakeSwap. However, a study by trade aggregator 0x in September reported that malicious Hooks in Uniswap v4 had issues with discrepancies between quoted and settled prices, with some trades settling for 50% less than quoted.

Uniswap founder Hayden Adams refuted 0x's criticism and promoted Uniswap's own API to avoid malicious Hooks. Dan Robinson of Paradigm also supported Uniswap's view, arguing that aggregators should vet Hooks themselves. 0x, however, questioned Uniswap's protective measures, claiming that malicious Hooks existed on its whitelist and citing a Robinhood Chain transaction where a malicious Hook extracted a portion of the fees. Uniswap updated its routing guidelines on October 16, and OpenZeppelin also audited specific router and peripheral changes on October 8.