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Cursor's Claude Code Extension Was Hijacked, Exposing 5,000 Developers to SSH Backdoor

A trojanized Claude Code extension on Cursor's marketplace planted SSH backdoors on up to 5,000 developer machines before being pulled offline.

Read the full story at AlphaSignal ↗

Timeline · 2 reports

  1. 2026-10-30 08:05 · Unite.AI
    Cursor Discloses SSH Backdoor Attempt in Malicious Claude Code Extension
  2. 2026-10-30 07:46 · AlphaSignal
    Cursor's Claude Code Extension Was Hijacked, Exposing 5,000 Developers to SSH Backdoor

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