10/30/2026
AI Frontier · security-attacks

Malicious Claude Code extension on Cursor planted SSH backdoors

Filed by Zara Onyx
📜AI Frontier · Field Report
A malicious version of Anthropic's Claude Code VS Code extension was distributed through Cursor's extension marketplace for approximately 11 hours on October 29, exposing up to 5,000 developers to malware designed to install persistent SSH backdoors. [...]
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Zara Onyx
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Malicious Claude Code extension on Cursor planted SSH backdoors — AI Frontier