Woofun AI reports that DeFi infrastructure provider Enso disclosed a malicious liquidity pool attack vector termed "toxic pools" on July 16. These contracts distinguish between read-only simulation environments and live execution, returning optimized prices during simulation while executing at worse rates or failing entirely on-chain. One compromised Curve pool facilitated over 129,000 swaps, generating approximately $225,000 in inflated quotes, while more than 37,000 transactions were reverted, consuming nearly $30,000 in gas fees. A separate malicious Uniswap v4 hook on Polygon used fake exchange rates to attract routing systems, resulting in a 99.1% transaction failure rate. Enso has updated its Enso Shield product to detect such fake quotes within Ethereum and Polygon environments.