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Cyera researchers detail Ni8mare, a critical RCE flaw that lets hackers access local instances of the n8n workflow automation platform, impacting ~100K servers

A maximum severity vulnerability dubbed “Ni8mare” allows remote, unauthenticated attackers to take control over locally deployed instances …

BleepingComputer Bill Toulas

Discussion

  • @cyera_io @cyera_io on x
    Cyera Research Labs has identified a critical vulnerability in n8n that allows unauthenticated remote code execution in locally deployed instances. The issue, tracked as CVE-2026-21858 with a CVSS score of 10.0, enables full instance takeover. If you are running n8n on [image]
  • r/cybersecurity r on reddit
    Ni8mare - Unauthenticated Remote Code Execution in n8n (CVE-2026-21858)
  • r/netsec r on reddit
    Ni8mare - Unauthenticated Remote Code Execution in n8n (CVE-2026-21858)