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Aptos patches critical bug risking $70B in assets with a $3,000 exploit cost

Protocol Fundamentals
04 Jul 2026
Crypto Briefing
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Aptos patches critical bug risking $70B in assets with a $3,000 exploit cost

Aptos Labs fixed a critical stale-cache bug in its Move virtual machine that could have allowed attackers to manipulate core blockchain data, risking up to $70 billion in assets. Security researchers demonstrated a proof-of-concept exploit with a 90% success rate using a $3,000 server and low-cost attack attempts. Aptos patched the flaw on mainnet within hours of discovery, and no user funds were lost. The incident highlights the importance for protocols relying on Aptos, especially cross-chain bridges, to audit their dependencies and the value of responsible vulnerability disclosure.

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