DeFi 再遭攻击：永续合约 DEX Ostium 因预言机攻击损失 1800 万美元
黑客通过攻陷预言机签名密钥操纵 Ostium 价格源，从基于 Arbitrum 的永续合约交易所提取约 1800 万美元。
Another DeFi Exploit: Perp DEX Ostium Loses $18 Million in Oracle Attack
Hackers manipulated Ostium's price feed by compromising an oracle signer key, allowing them to drain roughly $18 million from the Arbitrum-based perpetuals exchange.