Chainalysis user information exposed... KYT and address screening suspended

Chainalysis disclosed that names, usernames, password hashes and “live tokens” tied to its entire user base were exposed to a malicious actor, with the incident discovered on June 2 and publicly disclosed on June 5. The blockchain analytics firm took its KYT transaction monitoring product, address-screening tool and login page offline after detecting suspicious activity, and it flagged unauthorized access to some customers’ KYT accounts. The company did not disclose total user counts or specify which data elements were exposed across which accounts, leaving the scope of the breach unclear. The outage matters because KYT and address screening are widely used by exchanges and other crypto firms for compliance checks, so a prolonged disruption could stall onboarding and transaction monitoring workflows. What to watch next is how quickly Chainalysis restores KYT and address screening, and whether it clarifies per-account exposure and forces token or password resets.