Vulnerabilitycritical
Ni8mare flaw gives unauthenticated control of n8n instances
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2025-68613 | Authenticated RCE in n8n Workflow Automation Expression Evaluation | 8.8 | 99% | KEVPoC ×2 | KEV |
| CVE-2026-21858 | Unauthenticated RCE in n8n Workflow Automation (Ni8mare) | 10.0 | 78% | PoC ×2 |
From the original article
3 min read at securityaffairs.com
A critical n8n flaw (CVE-2026-21858, CVSS 10. 0), dubbed Ni8mare, allows unauthenticated attackers to fully take over vulnerable instances. Researchers uncovered a maximum severity n8n vulnerability, tracked as CVE-2026-21858 (CVSS score of 10.
By @securityaffairs · securityaffairs.com
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