A bot that previously executed a 70% sandwich attack on Ethereum was itself hacked and stolen $7.5 million. Jaredfromsubway.eth's experience is more thought-provoking than just the financial loss: when the top-tier MEV hunters become prey, it exposes not only a private key management mistake but also the fragility of the entire on-chain arbitrage infrastructure.

This attack occurred on the bot itself, not the user’s liquidity pool, indicating that MEV bots, as on-chain "infrastructure," are becoming high-value targets. They hold large permissions and funds for front-running and transaction reordering, and once vulnerabilities are exploited, the losses are borne directly by the bot, not the protocol or users.
A deeper signal is that the MEV supply chain is becoming more complex and opaque. Sandwich bots rely on complex node relationships, transaction ordering strategies, and private transaction flows; any breach in these links could trigger a chain reaction. Jaredfromsubway.eth’s case shows that even the most experienced participants cannot be completely immune.
For ordinary traders, this may not be an immediate risk, but it reminds us that on-chain "fairness" is fragile. When the security defenses of arbitrageurs are breached, market depth and transaction execution quality may suffer hidden impacts. In the dark forest of MEV, there are no eternal hunters.
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