Key Takeaways On Monday, July 6, 2026, an attacker used a $65.4 million flash loan to steal $6 million from Summer Finance. The attack pushed total DeFi ecosystem losses past $840 million in 2026, keeping the space on high alert. Protocol guardians paused all Lazy Summer Protocol vaults while the core dev team completes a full patch. Security Firms Flag Breach Blockchain security firms reported Monday, July 6, a major security breach targeting Summer Finance, a decentralized finance ( DeFi) yield optimization protocol. According to real-time onchain analytics flagged by security monitors, the protocol suffered an estimated loss of $6 …