Yearn: yETH pool suffered a complex attack, the incident is similar to the previous Balancer attack

BlockBeatsDec 1, 2025
On December 1st, Yearn issued a statement saying that its yETH stable pool was attacked at 21:11 UTC on November 30th. The attacker minted a large amount of yETH through a custom contract, resulting in a loss of approximately $8.00 million in assets in the pool, and another approximately $900,000.00 in losses from the yETH-WETH pool on Curve.

Yearn stated that the affected code is not related to other products, and V2/V3 Vaults were not affected. It also stated that the complexity of the incident is similar to the previous Balancer attack. Currently, the team has jointly launched an investigation with SEAL911 and auditing firm ChainSecurity.

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Yearn: yETH pool suffered a complex attack, the incident is similar to the previous Balancer attack

BlockBeatsDec 1, 2025
On December 1st, Yearn issued a statement saying that its yETH stable pool was attacked at 21:11 UTC on November 30th. The attacker minted a large amount of yETH through a custom contract, resulting in a loss of approximately $8.00 million in assets in the pool, and another approximately $900,000.00 in losses from the yETH-WETH pool on Curve.

Yearn stated that the affected code is not related to other products, and V2/V3 Vaults were not affected. It also stated that the complexity of the incident is similar to the previous Balancer attack. Currently, the team has jointly launched an investigation with SEAL911 and auditing firm ChainSecurity.

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