According to the Sui Foundation and Scallop developers, the Scallop lending protocol on the Sui network experienced a targeted security exploit on April 28, 2026, resulting in the unauthorized drainage of approximately 150,000 SUI tokens from a rewards liquidity pool, valued at around $140,000. The vulnerability involved a legacy smart contract component’s edge case in token release schedules. Developers implemented a rapid patch within hours of detection, halting further unauthorized withdrawals and preventing broader systemic impact. The Sui Foundation has accelerated the rollout of advanced developer tooling and improved static analysis frameworks, while the Scallop team initiated a comprehensive bug bounty program and coordinated with third-party security firms to review remaining legacy contracts.
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