Trader Loses $2M in ‘Same-Block Backrun Extraction’ Exploit
Vexoda Newsroom
A trader lost $2 million after a router directed an order through a low-liquidity pool, allowing an Ethereum block builder to profit from the same-block arbitrage trade. The incident highlights risks
On July 7, 2026, a crypto trader swapped $2.01 million worth of Ether (ETH) but only received 5,776 Lighter (LIT) tokens due to a router directing the order through a low-liquidity pool on Uniswap v3. This led to an 'same-block backrun extraction' incident where Titan Builder profited $1.8 million from this trade.
The transaction involved approximately 1,117 ETH being routed into a low-liquidity AVAIL/WETH pool, causing the trade to execute at about 120 times higher than expected. The router sold some externally sourced AVAIL tokens and extracted around 1,072 WETH before paying out 1,018 ETH worth $1.8 million as builder reward.
Following this transaction, Titan received a significant portion of the profit by swapping the AVAIL for $14,200 worth of LIT tokens, resulting in a 99.3% loss to the trader. The incident underscores the risks associated with MEV bots and liquidity routers, which can significantly impact traders if they are not cautious.
To avoid such incidents, crypto trader Ruslan Khairullin advises that traders should read the transaction route before signing any DEX transactions. This precautionary step could have prevented this $2 million loss in the future.
The broader implications of this incident include heightened awareness about MEV risks and potential regulatory measures to mitigate them. The event also highlights the importance of transparency and understanding how liquidity pools work, as traders can lose significant sums if they are unaware of these complex mechanisms.
Traders should continue monitoring developments in DeFi security and be vigilant against such exploits. Additionally, platforms like Titan that offer block building services have seen substantial revenue growth this year, with Titan making $112.6 million so far.
Source: Cointelegraph. Summarized and rewritten by the Vexoda Newsroom. This is market news, not financial advice.