Malicious Claude Code extension found and removed from Cursor's marketplace

0xkarasy · x · 2026-10-31

Analysis confirmed a malicious Claude Code extension was distributed through Cursor's marketplace and has since been removed. Microsoft's VS Code Marketplace extension and Anthropic's npm package were not affected — a supply-chain security reminder for AI coding users.

Related event: Officially-branded Claude Code extension poisoned in Cursor marketplace supply-chain attack(23 posts)→

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