At a glance
Organisation
Anthropic
Kind
Breach or incident
Sector
Sector not stated
Severity
Medium
Disclosed
Aug 2026
Indexed
30 Aug 2026
Source
Summary
Anthropic is warning some Claude users that infostealer malware on their PCs has stolen active Claude login sessions, allowing attackers to access accounts and consume their usage.
This record says what was disclosed, when and by whom. It does not say that any person or firm was affected.
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