Coinbase said an incident involving analytics vendor Amplitude exposed the contact details of a “small subset” of its customers, as well as data belonging to other companies using the service. The blockchain exchange said it found no evidence of unauthorized access to its own systems and that customer funds were not affected. In South Korea, Bithumb is investigating a possible breach of its internal platform, while Daishin Securities reported a leak of personal and credit data affecting 38,490 customers. In May 2025, Coinbase disclosed a separate data breach affecting less than 1% of its monthly transacting users, with reimbursement and remediation costs estimated at up to $400 million.
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