Balancer V2 Exploit Impacts Composable Stable Pool – 73.5% Tokens Recovered

Balancer’s V2 Composable Stable Pool suffered a significant exploit affecting multiple blockchain networks, including Ethereum, BSC, and Polygon. The attack stemmed from a rounding error in the EXACT_OUT transaction logic of batchSwap processes on November 4th. Balancer swiftly implemented containment measures by pausing the pool, freezing assets, and collaborating with security partners to address the issue effectively. 73.5% of the affected osETH tokens were recovered promptly.