MEV Bot Yoink Front-Runs $7.8M Ethereum Hack [2026]

On September 15, 2026, an automated trading program did something most exchange-listed companies would get sued for: it watched a theft happen in real time, copied the attacker’s exact method, and grabbed the money first. The bot, known on-chain as Yoink, intercepted roughly $7.8 million in rsETH, Kelp DAO’s liquid restaking token, moments after a hacker attempted to drain the same funds from a misconfigured Safe wallet. Yoink paid about 18.93 ETH, close to $46,000, to an Ethereum block builder to guarantee its transaction landed first. The attacker got nothing. Whether Kelp DAO or its users got anything back is still an open question.

The incident is a clean, almost clinical example of what crypto engineers call MEV, or maximal extractable value: the profit a block producer or a well-positioned bot can squeeze out of the order in which transactions get processed. MEV has existed since Ethereum’s early arbitrage days, but the Yoink episode pushes it somewhere new. A bot didn’t just reorder trades for profit. It raced a criminal to the finish line using the criminal’s own exploit code, then paid cash to a block builder to win. It’s the latest entry in a run of cryptocurrency security incidents that have made 2026 a rough year for anyone holding assets in a shared wallet.