SEI blockchain experienced a $240,000 flash loan attack after a user accidentally transferred funds, triggering a vulnerability. The incident, reported on January 9th, involved an attacker using a Synnax contract to borrow 1.96 million WSEI tokens without repayment. The attack was facilitated by a misoperation three blocks earlier, where address 0x9748…a714 mistakenly transferred funds into the contract, inadvertently enabling the exploit. This highlights the ongoing risks of on-chain misoperations in DeFi environments.