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Claude Code

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Claude Code extension 2.1.313 in Cursor Marketplace installing a persistent SSH backdoor

Claude Code extension in Cursor contained an SSH backdoor – up to 5,000 affected

Claude Code extension 2.1.313 in Cursor installed a persistent SSH backdoor. Check whether you were affected, why uninstalling is not enough and what to do now.
  • 30. October 2026
  • 19 views
  • 8 minute read