Compound V3 Upgrade Review Finds Four Critical Security Vulnerabilities

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A security review of the upcoming Compound V3 upgrade on Ethereum and other blockchains was published on October 14, 2026. The review, conducted by a senior DeFi security researcher, assessed the technical compatibility and security risks of the new version. It identified nine distinct attack vectors, with four rated as critical. These critical flaws could potentially lead to fund loss or market manipulation. The overall upgrade compatibility was given a risk score of 6.8 out of 10.

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