Coinbase Denies Breach After Amplitude Security Incident Exposes Customer Data Coinbase has denied a data breach after a security incident at third-party provider Amplitude exposed some of the customer's contact details, and confirmed that there was no unauthorized access to its systems. The exposed data, including email addresses and phone numbers, could increase the risk of phishing and social engineering attacks, although Coinbase did not disclose the number of affected users. Other exchanges, such as Bithumb, are also facing data security issues, with reports of unauthorized access and leaks of customer data highlighting ongoing vulnerabilities in the crypto sector.