Anthropic’s Claude Code Reportedly Uses Hidden Code to Detect Chinese Users

Cybersecuritynews •Guru Baran • June 30, 2026

A disclosure has ignited a serious debate developer trust and covert surveillance, alleging that Anthropic embedded undisclosed detection logic inside its Claude Code CLI tool, specifically targeting users in China or those routing traffic through Chinese AI lab proxies. A user identified as LegitMichel777 on the r/ClaudeAI subreddit posted detailed findings on […]

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Anthropic's Claude Code Faces Backlash Over Covert User Tracking of Chinese Users Anthropic's AI tool, Claude Code, was found to contain hidden tracking mechanisms targeting Chinese users, raising significant privacy concerns. The covert detection logic, embedded since April 2, 2026, identified users based on their timezone and proxy settings, transmitting data back to Anthropic's servers using steganographic techniques. Following the revelations, Alibaba announced a ban on Claude Code for its employees, effective July 10, 2026, citing security risks. The tracking mechanism was discovered by developer LegitMichel777 and confirmed by security researchers, leading to widespread criticism of Anthropic's practices. The company claimed the tracking was an 'experiment' aimed at preventing unauthorized reselling and model distillation. Despite removing the code on July 1, the backlash continues, with concerns over user privacy and transparency in AI tools. The incident highlights ongoing tensions between Anthropic and Chinese entities amid allegations of industrial espionage. 41 sources 71

Anthropic’s Claude Code Reportedly Uses Hidden Code to Detect Chinese Users

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