Balancer exploited, drains over $100M from V2 pools and forks

Balancer, a decentralized exchange and automated market maker, was hit by a major security exploit on November 3, 2025, that drained more than $100 million from its V2 contracts and related forks, according to blockchain analytics firms and statements from Balancer. Initial onchain logs showed roughly $70.9 million in liquid staked Ether tokens moved in three transactions to a newly created wallet, while subsequent analyses raised the total stolen across multiple chains to between $116.6 million and $128.6 million.

Blockchain data and security firms reported that the transfers included large quantities of wrapped and staked Ether tokens, including roughly 6,850 StakeWise staked ETH, 6,590 wrapped ETH and 4,260 Lido wrapped stETH in the earliest observed moves. Analytics platforms later mapped additional outflows and flagged activity across several chains, with Ethereum accounting for the largest share and other affected networks including Berachain, Arbitrum, Base, Sonic, Optimism and Polygon.

Balancer acknowledged the incident in a Monday post, saying, "We're aware of a potential exploit impacting Balancer v2 pools. Our engineering and security teams are investigating with high...