Yearn Finance's yETH Exploited; Attacker Drains Liquidity from Balancer

Published at 2025-12-01 00:30:10

Yearn Finance said on Sunday that its yETH product was under active exploit after an attacker managed to mint an effectively unlimited supply of yETH and siphon liquidity out of linked Balancer pools. The report flagged immediate abnormal minting activity and outflows; Yearn has publicly acknowledged the incident but has not published a full estimate of funds lost.

The breach underscores ongoing composability risks in DeFi, where a vulnerability in one contract can cascade into liquidity providers and pools across protocols. Traders and YFI holders should expect market volatility and close monitoring as investigations proceed; on-chain analysts and counterparties will be watching for mitigation steps, recoveries, or emergency updates from Yearn and Balancer teams.

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PolygonSmart ContractsDeFiExploitsSecurity

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