Uniswap launches aggregator hooks integrating seven external liquidity sources

Uniswap Labs launched Aggregator Hooks on October 22, 2026, across Ethereum, Base, and Robinhood Chain, enabling Uniswap v4 to route swaps through seven external liquidity sources including Curve, Fluid, and PancakeSwap. The integration covers over 90% of DEX activity on these networks and directs generated protocol fees toward burning UNI tokens, fulfilling goals set in the November 2025 UNIfication proposal. The expansion occurs amidst an ongoing dispute with aggregator 0x over malicious hook screening and trade execution security.

Aggregator Hooks launch

• ▪Aggregator Hooks make liquidity from external decentralized exchanges appear as native Uniswap v4 pools to trading routers
• ▪The initial Aggregator Hook, built for Uniswap v4, went live in March 2026 on Tempo, a payment-focused blockchain developed by Stripe and Paradigm
• ▪Uniswap Labs launched Uniswap v4's Aggregator Hooks on October 22, 2026, across Ethereum mainnet, Base, and Robinhood Chain

External liquidity integration

• ▪Swaps using Uniswap v4's Aggregator Hooks feature block-refreshed price quotes, atomic single-transaction settlement, and preserve existing token approvals
• ▪Aggregator Hooks connect seven external liquidity sources that account for over 90% of decentralized exchange activity across Ethereum, Base, and Robinhood Chain
• ▪The external liquidity venues integrated at the Aggregator Hooks launch on October 22, 2026 include Curve, Fluid, PancakeSwap, and Slipstream

Protocol fee UNI burns

• ▪Trades routed through external liquidity sources pay Uniswap protocol fees that contribute to burning native UNI tokens
• ▪Uniswap founder Hayden Adams stated that Uniswap v4's Aggregator Hooks add zero margin to native Uniswap liquidity while applying a few basis points of protocol fees to external routes

Malicious hooks dispute

• ▪A September 14, 2026 study by trading aggregator 0x examining 84,163 hooks across six chains classified 54.2% as malicious and 26.4% as likely malicious due to quote-versus-execution price disparities
• ▪Uniswap routing guidance updated on October 16, 2026, states that Uniswap's router requires manual allowlisting for hooks using specific permissions, leaving security guarantees outside the guidance's scope
• ▪Uniswap founder Hayden Adams and Paradigm's Dan Robinson rejected 0x's September findings on malicious Uniswap v4 hooks, arguing that aggregators and routers are responsible for vetting and screening which hooks they route trades through
• ▪0x engineer Duncan Townsend stated that 0x used Uniswap's allowlist and alleged that at least one malicious hook was included on the allowlist

UNIfication proposal background

• ▪Uniswap's UNIfication governance initiative, approved in December 2025, included a direct one-time treasury burn of 100 million UNI tokens
• ▪Uniswap's UNIfication proposal published in November 2025 outlined plans to activate protocol fees on products including aggregator hooks, v4, and UniswapX to direct revenue toward UNI burns