Maximum Severity “Ni8mare” Bug Lets Hackers Hijack n8n Servers (Phil Muncaster – Infosecurity Magazine)

Security experts have warned of a critical new vulnerability in popular AI workflow automation platform n8n that could enable adversaries to take over locally deployed instances and compromise enterprise secrets. Cyera revealed the “Ni8mare” vulnerability (CVE-2026-21858) in a blog post yesterday. It has a CVSS score of 10.0, reflecting the fact that remote, unauthenticated hackers can exploit the bug with potentially severe consequences.

Maximum Severity “Ni8mare” Bug Lets Hackers Hijack n8n Servers – Infosecurity Magazine

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