Key Takeaways
- A security incident at analytics provider Amplitude resulted in the exposure of contact details belonging to certain Coinbase customers.
- According to the exchange, only a limited portion of its user base was impacted, alongside customers of other Amplitude clients.
- Coinbase clarified that its internal systems were not compromised and customer assets remain secure.
- On the same date, South Korean platforms Bithumb and Daishin Securities also disclosed data security concerns.
- The exchange had earlier revealed a different security breach in May 2025, with potential costs reaching $400 million.
On Wednesday, Coinbase announced that contact details belonging to certain customers were compromised during a security event involving Amplitude, a third-party analytics service provider the platform utilizes.
The cryptocurrency platform emphasized that the vulnerability originated with the external vendor rather than within Coinbase’s own infrastructure. The company stated it discovered no indication that unauthorized parties breached Coinbase’s internal systems.
Coinbase’s Statement on the Amplitude Security Event
The company’s support team disclosed the information through a message posted on X. According to the announcement, the incident impacted a limited portion of Coinbase’s customer base.
The breach extended beyond Coinbase alone. Additional companies using Amplitude’s services were similarly affected during this security event.
According to Coinbase, the compromised information consisted of contact details. The platform reassured users that no customer assets were at risk.
The exact number of affected users was not disclosed by Coinbase. When contacted by Cointelegraph for specific figures, the company had not provided a response at press time.
Amplitude offers analytics solutions that enable businesses to monitor user engagement across their digital platforms. Organizations frequently transmit certain user information to external service providers to operate these analytical functions.
Additional Security Incidents Disclosed Simultaneously
Coinbase’s announcement coincided with multiple other security-related disclosures from both cryptocurrency platforms and conventional financial institutions.
In South Korea, cryptocurrency platform Bithumb is conducting an investigation into a potential security compromise. The exchange is examining whether an intrusion into its internal operational system may have resulted in customer information exposure.
Separately, South Korean brokerage firm Daishin Securities confirmed a data exposure incident. The financial institution reported that personal and credit-related information of 38,490 clients was compromised.
No information has been provided indicating whether these various incidents share any connection.
This marks the second time Coinbase has addressed a data security issue recently. In May 2025, the platform revealed a distinct incident that impacted fewer than 1% of its active monthly users.
During that episode, malicious actors obtained customer information and issued a $20 million ransom demand. Coinbase declined to comply with the extortion attempt.
The platform projected that costs associated with customer reimbursement and corrective measures from that breach could total as much as $400 million.
Currently, Coinbase maintains that its proprietary systems were not penetrated and that customer assets remain protected. The company has yet to disclose the total number of users affected by the Amplitude-related incident.
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