Cursor finds malicious Claude Code in marketplace, up to 5,000 users at risk of remote access

Polymarket · x · 2026-10-30

Polymarket reports that Cursor discovered a malicious version of Claude Code in its marketplace that attempts to give hackers remote access to users' computers, potentially affecting up to 5,000 users. A rare real-world supply chain attack on AI coding tools, highlighting the trustworthiness of extension marketplaces.

Related event: Poisoned Claude Code extension with SSH backdoor hits Cursor marketplace, up to 5000 users exposed(12 posts)→

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