Claude Code source code suspected to have been leaked via NPM and has been uploaded to GitHub for backup

MeNews · 2026-04-02T13:44:25+00:00

Intern researcher at Web3 security company FuzzLand states that Anthropic's Claude Code source code appears to have been leaked through the NPM registry, with related files uploaded to GitHub, containing undisclosed feature hints and TODO comments. Anthropic has not responded to this matter yet.

MeNews

2026-04-02 13:44:25

Abstract generation in progress

ME News message, on March 31 (UTC+8), Web3 security and analytics firm FuzzLand intern researcher Chaofan Shou posted on X, claiming that the source code for Anthropic’s terminal development tool Claude Code appears to have been leaked through a map file from its NPM registry, and the corresponding compressed package has been made publicly available for download. Netizens said someone has backed up the full code and uploaded it to a GitHub repository called “claude-code,” and shared that it contains a large number of TODO comments and hints about unreleased features. There is currently no evidence showing that the repository or the compressed package was officially authorized by Anthropic, and Anthropic has also not yet publicly responded to the alleged leak incident. (Source: X platform)

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