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Balancer V2 Suffers $128 Million Exploit via Flash-Loan Attack

Balancer initiates $4.1M white-hat recovery after V2 stable pool exploit, while advising users to avoid vulnerable pools; V3 operations remain unaffected.

Summary

Balancer V2, following its $128 million flash-loan exploit, has successfully moved $4.1 million to a controlled escrow in a white-hat recovery effort. The action addresses part of the recent Composable Stable Pool incident. Balancer V3 is confirmed unaffected, and the platform advises users to avoid the listed impacted pools until reconciliation is complete.

Terms & Concepts
  • Flash-loan attack: A type of exploit where attackers borrow large amounts of cryptocurrency instantly without collateral, execute complex transactions, and repay the loan within the same block.
  • Composable Stable Pools: Specialized liquidity pools on Balancer V2 designed for stable assets, allowing integration with other protocols and optimized trading efficiency.
  • Weight calculation overflow: A technical vulnerability occurring when numerical weight values exceed system limits, causing incorrect computations that can be exploited.