Chainalysis takes crypto tracing tools offline after breach exposes password hashes of all users
Blockchain analytics company Chainalysis said on November 4, 2026, that names, usernames, password hashes, and live tokens for all its users had been exposed in a cyberattack it first disclosed on October 30. The company took its Reactor investigations tool, its KYT transaction monitoring service, and its login page offline, and every user must reset their password before using restored services. Chainalysis said it has no evidence that investigations data was accessed.