Ni8mare: Critical Vulnerability in n8n Lets Hackers Hijack Servers

In early January 2026, cybersecurity researchers disclosed a maximum-severity security flaw in the popular open-source workflow automation platform n8n. Tracked as CVE-2026-21858 and nicknamed “Ni8mare,” this vulnerability carries a CVSS score of 10.0 — the highest possible rating, meaning exploitation…




