Balancer reported that a rounding error in its swap logic led to a major exploit on November 3, draining over $128 million from its Composable Stable Pools across various networks. The flaw allowed attackers to manipulate pool balances and extract funds before emergency measures were implemented to contain the damage.

Balancer's DeFi protocol was exploited, resulting in a loss of $116 million due to a sophisticated code attack that targeted specific stable pools. The hacker manipulated a rounding function in conjunction with BatchSwaps to drain the funds. Balancer has paused affected pools and is working with partners to recover some of the stolen assets.

The DeFi protocol Balancer may have been exploited, with over $128.6 million in assets withdrawn from its vaults. The issue appears linked to a faulty smart contract check, and the attack is reportedly ongoing across multiple chains. Balancer is investigating the situation and has confirmed the exploit.