DeFi Exchange Ostium Loses $18 Million Following Oracle Attack
Ostium, a decentralized perpetuals exchange built on Arbitrum, lost approximately $18 million after attackers exploited an oracle signer key to manipulate price feeds. The attack drained nearly one-third of the protocol's total value locked ($63 million). This incident adds to a growing trend of DeFi exploits in 2026.
Topics: blockchain security DeFi hacks/exploits Oracle attack