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Backdoor in Claude Code for VS Code extension on the Cursor Marketplace

Phorion has detected a backdoor in the official Claude Code for VS Code extension bundle on the Cursor Marketplace that drops a persistent SSH backdoor across macOS, Linux, and Windows. This write-up …
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Security & PrivacySoftware Engineering2026

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Oct 30, 2026Backdoor in Claude Code for VS Code extension on the Cursor Marketplace by _chall1,012553

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