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Anthropic Users Hit by Infostealer Attacks, Session Thefts
August 31, 2026 · Dark Reading · Severity: MEDIUM
A threat actor used a variety of infostealers to collect session information and access Claude accounts belonging to an unknown number of users.
Key Takeaways
- A variety of infostealers collected session data to compromise Anthropic's Claude accounts.
- Threat actors used stolen session information to access an unknown number of accounts.
- The attacks targeted Anthropic users through multiple types of infostealer malware.