Trader loses $2M in ‘same-block backrun extraction’ exploit
A trader lost nearly all value in a DEX swap after a router sent about 1,126.44 ETH through a low-liquidity pool, turning $2.01 million into roughly $14,500 in tokens. The trade yielded 5,776 LIT tokens and was described as a “same-block backrun extraction,” not a classic sandwich attack. GoPlus Security said the swap first pushed about 1,117 ETH into a thin AVAIL/WETH pool on Uniswap v3, creating a severe price imbalance. A block builder then exploited the distorted pool, extracting about 1,072 WETH and receiving 1,018 ETH, or around $1.8 million, as a builder reward. The incident highlights MEV and router risks in DeFi and underscores the need to review transaction routes before confirming swaps. Titan Builder has earned significant revenue from block-building services this year.
