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My Worst SUPRA Prediction Came True

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156 views21likes6:30MoxLeonhardOriginal Release: 2026-07-18

In decentralized finance (DeFi), oracle vulnerabilities can lead to catastrophic losses when attackers exploit price manipulation bugs. The $9 million HAR hack demonstrates how an attacker purchased worthless source coins and exploited a Supra Oracle verifier bug that falsely accepted a zeroed signature, inflating the price on the oracle. This allowed the attacker to borrow $9 million in USDT against the inflated fake price as collateral. The incident highlights the critical importance of rigorous code review and security testing in DeFi systems, as even obvious bugs can result in massive financial losses when exploited.