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BlockSec: FutureSwap Protocol on Arbitrum Under Attack Again, Reentrancy Vulnerability Causes Loss of $74,000

2026-01-14 12:00:51

ARB-2.44%

Foresight News reports that, according to BlockSec Phalcon monitoring, the Futureswap contract on Arbitrum was attacked again, with an estimated loss of about $74,000. Although the loss is not large, it is worth noting that this attack exposed a new attack surface: reentrancy vulnerability. The attacker stole funds from the protocol through a two-step process that included a three-day cooldown period. The first step is the minting phase, where the attacker exploited the reentrancy vulnerability during liquidity provision by re-entering the 0x5308fcb1 function before the contract updated internal accounts, minting a large amount of LP tokens relative to the actual deposited assets. The second step is the withdrawal phase, where the attacker waited for the mandatory three-day withdrawal cooldown period and then executed the withdrawal, burning the illegally minted LP tokens to exchange for the underlying collateral, effectively stealing assets from the protocol and making a profit.

Disclaimer: The information on this page may come from third-party sources and is for reference only. It does not represent the views or opinions of Gate and does not constitute any financial, investment, or legal advice. Virtual asset trading involves high risk. Please do not rely solely on the information on this page when making decisions. For details, see the Disclaimer.

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