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GMX: The $40 million attack originated from a reentrancy vulnerability in the OrderBook contract.
PANews July 10 news, GMX official disclosed the reasons and subsequent measures for the approximately $40 million attack on GMX V1 on the Arbitrum chain on July 9. According to the security team's analysis, the attack originated from a reentrancy vulnerability in the OrderBook contract, where the hacker manipulated the average price of BTC short positions, significantly raising the price of GLP and executing arbitrage. The official has suspended related transactions on the Avalanche chain, confirmed that the V2 version is unaffected, and will take measures such as disabling GLP minting and redemption, and establishing a compensation pool. GMX reminds V1 fork projects to promptly fix similar risks.