What is the Claude Code vulnerability?

It's a flaw where after 50 subcommands, Claude skips intensive security checks and just asks user approval—easy bypass for hidden malicious actions.

How do attackers exploit Claude Code?

By hiding bad commands in long, legit-looking sequences inside CLAUDE.md files in repos, tricking Claude into exfiltrating data without full scans.

Is Anthropic fixing the Claude Code leak vulnerability?

They have a fix (tree-sitter parser) in the leaked code, but it's not active in customer builds yet—leaving users exposed.

🤖 Large Language Models

Claude Code's 50-Command Bypass: Leak Exposes Fix That's Not Live

Imagine feeding Claude Code a repo that looks legit, but slips in a credential-stealing command after 50 harmless ones. The AI skips deep checks—and just asks if you're sure.

theAIcatchup Apr 08, 2026 3 min read

Diagram of Claude Code 50-command security bypass exploit from leaked source

⚡ Key Takeaways

Claude Code bypasses security after 50 subcommands, relying on user approval instead of deep checks. 𝕏
Anthropic has a fix in the leaked source but hasn't deployed it to public versions. 𝕏
Attackers can poison repos with CLAUDE.md files, risking supply-chain credential theft. 𝕏

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theAIcatchup

Community-driven. Code-first.

#AI supply chain attack #Anthropic security #Claude Code vulnerability #tree-sitter parser

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Originally reported by InfoWorld

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