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Yearn Finance's yETH Product Targeted in Attack, Approximately 450 Million Yen in ETH Drained

2025/12/01 13:15 (Updated 2025/12/01 17:01)
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Written by Enzo
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Yearn Finance's yETH Product Targeted in Attack, Approximately 450 Million Yen in ETH Drained

Infinite Mint Attack on yETH

On December 1, the decentralized finance (DeFi) protocol Yearn Finance disclosed that its liquid staking token aggregation product 'yETH' had been attacked.

The attacker exploited a vulnerability in the smart contract to mint an unlimited number of yETH tokens, thereby draining real assets from the pool in a single transaction.

According to blockchain data, the attacker transferred about 1,000 ETH (approximately $3 million, or about 450 million yen) to the cryptocurrency mixing service 'Tornado Cash'. Multiple smart contracts were used in the attack...

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