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BreachesAug 31, 2026

Anthropic Users Hit by Infostealer Attacks, Session Thefts

Anthropic users targeted by infostealer attacks leading to session theft.

Summary

A threat actor has successfully targeted users of Anthropic's AI chatbot, Claude. The attacker employed various infostealer malware strains to pilfer session cookies and credentials, granting them unauthorized access to user accounts. The exact number of affected users remains unknown.

Indicators of Compromise

  • malware — infostealer

Entities

Claude (product)Anthropic (vendor)