Yearn Finance reported an exploit in its yETH stablecoin swap pool on November 30, resulting in a loss of approximately $9 million. The incident, which occurred at 21:11 UTC, affected the stableswap pool with losses around $8 million and the yETH-WETH pool on Curve with losses of about $900,000. Yearn clarified that the compromised contract was a custom version based on stableswap code and is unrelated to other products, with V2/V3 vaults remaining unaffected. Initial analysis suggests the attack's complexity is similar to a recent Balancer exploit.