Ostium pauses trading as security firms report multimillion-dollar oracle exploit
Ostium paused trading after blockchain security firms Blockaid and CertiK reported an apparent exploit of its OLP liquidity vault. They estimated losses at roughly $18 million to $22 million and said the incident likely involved a compromise of Ostium’s oracle system, which provides external price data. Ostium said it identified an issue affecting the vault, halted all trading, and advised users to temporarily revoke contract approvals while it investigates. The protocol has not confirmed the cause or loss amount. Built on Arbitrum, Ostium offers onchain perpetual trading across stocks, ETFs, commodities, indices, forex and crypto. The incident adds to a run of DeFi hacks this year, with security researchers increasingly pointing to vulnerabilities in offchain infrastructure such as oracles, access controls and key management.
