Hacker steals over $120 million from Balancer DeFi crypto protocol

Balancer Protocol disclosed an exploit of its V2 Compostable Stable Pools that resulted in roughly $128M stolen; investigators suspect a precision rounding error in the Vault’s swap calculations (compounded via batchSwap) or improper authorization/callback handling during pool initialization. Balancer is working with security researchers, warned users about scams, and promised a post-mortem; meanwhile, opportunistic impersonators attempted to contact the attacker with a fraudulent “white-hat bounty” offer. No attribution has been confirmed, though the report notes North Korean-linked thefts are a prominent threat to DeFi generally.