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Coinbase Breach Timeline Disputed by Security Researcher

First seen 17 Nov 2025, 20:12 UTC • •

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ThreatCluster •March 12, 2026 at 13:27 UTC

A security researcher claims that Coinbase was aware of a breach affecting nearly 70,000 customers since December 2024, but did not disclose it until months later. The researcher, Jonathan Clark, reported the incident to Coinbase on January 7, 2025, after being targeted by the criminals involved in the breach. He asserts that he has evidence supporting his claims, including communications with Coinbase's Head of Trust and Safety.

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