Ethereum and Arbitrum Suffer $290 Million Massive Attack

BroadChain has learned that at 15:16 on April 19, according to U.Today, one of the largest decentralized finance (DeFi) attacks in 2026 occurred on Saturday, targeting Ethereum and its Layer 2 network Arbitrum, resulting in losses as high as $290 million. This incident once again highlights the severe challenges faced by the DeFi sector in terms of smart contract security and cross-chain interoperability.