Policy & Drama

Hackers are stealing Claude tokens from subscribers

Last month, a Claude user noticed his account was consuming tokens even though he wasn't working. Anthropic has since warned users about hackers.

Get smart on it

Hackers have been stealing Claude tokens, which represent usage allowance on Claude subscriptions, by obtaining unauthorized access to user accounts through compromised session keys and infostealer malware. Multiple subscribers discovered their token usage increasing without performing any work themselves, and Anthropic confirmed that attackers were using stolen login sessions to consume account credits. The issue matters because token theft can go undetected for extended periods since account support tracks only total usage rather than itemized breakdowns, and affected users had difficulty getting swift resolution or understanding how their accounts were compromised. Anthropic responded by signing out affected users, invalidating authorizations, and issuing refunds where it identified suspicious activity, though the company declined to provide guidance on how users can protect themselves or identify misuse.

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