Coinbase vendor Amplitude suffers data breach exposing customer contact information

Oct 28, 2026

Analytics vendor Amplitude suffered a security incident on October 27-28, 2026, exposing contact data for over 70,000 Coinbase users according to blockchain security firm SlowMist. The breach compromised email addresses and phone numbers but not passwords, transaction histories, or funds. Coinbase stated its own systems were not breached and is notifying affected customers while warning of potential phishing attempts.

Amplitude security incident

▪A security incident occurred at Amplitude on October 27-28, 2026
▪The Amplitude security incident on October 27-28, 2026, affected multiple clients beyond Coinbase
▪Amplitude is a third-party analytics provider used by Coinbase
▪Coinbase reported the Amplitude security incident to the appropriate regulatory authorities

Exposed customer data scope

▪Coinbase stated there is no evidence of unauthorized access to its internal systems in the Amplitude incident
▪SlowMist reported that contact data belonging to over 70,000 Coinbase users may have been accessed by hackers in the Amplitude security incident on October 27-28, 2026
▪Coinbase urged users to watch for phishing and social engineering attempts following the exposure of their contact information in the Amplitude security incident on October 27-28, 2026
▪Coinbase stated that customer funds and assets remain safe following the Amplitude security incident on October 27-28, 2026
▪The Amplitude security incident on October 27-28, 2026, exposed customer email addresses and phone numbers

Coinbase customer notifications

▪Coinbase described the group of customers affected by the Amplitude security incident on October 27-28, 2026, as a small subset of its customers
▪Coinbase Global, Inc. had annual revenue of $7.2 billion USD for the fiscal year ended December 31, 2025
▪Coinbase is notifying affected customers by email about the Amplitude security incident on October 27-28, 2026
▪The Coinbase Amplitude breach article publication date is October 28, 2026
▪Coinbase Global, Inc. had a market capitalization of $42.5 billion as of October 27, 2026