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Moonwell Loses ¥2.6 Billion After Oracle (off-chain data feed) Misconfiguration in AI-Coauthored Code

Experts warn this may be the first AI-induced DeFi (blockchain-based finance) hack; the code was co-authored by Claude Opus 4.6 (AI model), and a misconfigured oracle (off-chain data feed) triggered the loss.

Summary

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Terms & Concepts
  • Oracle: A service that delivers off-chain data to blockchains; misconfiguration can expose protocols to faulty pricing and exploits.
  • DeFi: Decentralized finance—blockchain-based financial applications that operate without traditional intermediaries.
  • Smart contract: Self-executing blockchain code that enforces predefined rules automatically.