Anthropic experiences major leak of proprietary code

(SeaPRwire) –   The highly confidential internal designs of this Amazon-backed technology were inadvertently released due to “human error”

AI giant Anthropic accidentally published its own top-secret internal code, sparking a viral wave of GitHub reposts and inflicting potentially catastrophic commercial damage on its Amazon-backed business model.

The developer behind the Claude chatbot characterized the incident as a release issue “caused by human error, not a security breach,” according to US technology news site VentureBeat on Tuesday.

In February, US Defense Secretary Pete Hegseth designated Anthropic a “risk to national security” following disagreements with the Pentagon over the use of its artificial intelligence systems.

Per Axios and The Verge, the leak involved more than 500,000 lines of code tied to Claude Code, Anthropic’s AI coding assistant that helps users write and manage software via natural language commands. The materials included unreleased features, performance data, and developer notes.

The code spread quickly online, with copies uploaded to code-sharing platform GitHub and replicated thousands of times within hours, according to Ars Technica and The Verge. Anthropic took steps to remove the material and issued takedown notices, but the content had already been widely copied and circulated, the outlets reported.

According to VentureBeat, by exposing the “blueprints” of Claude Code, the leak may have given “bad actors” a “road map” to bypassing security checks or tricking the tool into running hidden commands or accessing data without the user’s knowledge.

A separate data leak reported in February exposed internal materials revealing details of Anthropic’s unreleased model, known as Claude Mythos, after thousands of draft documents were left accessible in a public data cache.

The model was described in the leaked materials as the company’s most powerful system to date, which could pose “unprecedented cybersecurity risks” if deployed widely. Per US business magazine Fortune, the company has withheld its release due to concerns over its capabilities and potential misuse.

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