SlowMist said a Balancer V1 pool was exploited, with losses estimated at about $234,000. According to its monitoring, the issue stemmed from a precision flaw in BPool’s joinswapPoolAmountOut function. The attacker first pushed WBTC reserves down to an extremely low level, then used roughly 1 satoshi of WBTC to mint a large amount of BPT. After that, the attacker exited proportionally and drained assets including DPI, USDC, WETH, and WBTC. The update was published via SlowMist’s monitored alert and cited by Foresight as a 7x24 brief.
According to SlowMist monitoring, a Balancer V1 pool was exploited, with losses of about $234,000.
SlowMist said BPool’s joinswapPoolAmountOut had a precision issue. The attacker pushed WBTC reserves to an extremely low level, then minted a large amount of BPT with roughly 1 satoshi of WBTC. The attacker later exited proportionally and drained assets including DPI, USDC, WETH, and WBTC.
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