Blockchain analytics firm, Chainalysis, has disclosed a cybersecurity incident involving unauthorized access to its systems saying an investigation has found no evidence that attackers accessed sensitive investigation data, passwords, or authentication credentials.
In a security notice published on October 30 2026, the company said it was working with external cybersecurity experts to investigate the incident, determine its scope, and strengthen its systems.
Chainalysis said some customer information, including user IDs, names, email addresses and organizational roles, may have been accessed. It has not disclosed how many customers were affected or how attackers gained entry.
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The company said there was no evidence that attackers accessed investigation graphs, case notes, transaction results, or query results. It also reported no evidence of compromised passwords, multi-factor authentication secrets, or session tokens.
The incident raises concerns about the security of blockchain analytics firms that handle sensitive financial intelligence for cryptocurrency businesses, financial institutions, and law enforcement agencies.
Chainalysis said it had notified customers and would provide further updates as its investigation progresses.
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