Decentralized lender zkLend lost $9.5 million in Ethereum due to a smart contract rounding error exploit. The attacker manipulated the "lending_accumulator" to repeatedly withdraw more funds than deposited. zkLend offered the hacker 10% as a bounty if they return 90% (3,300 ETH) by February 13, or they will pursue legal action. No response has been received yet.

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