Critical n8n Vulnerability (CVSS 10.0) Lets Unauthenticated Attackers Take Full Control
Cybersecurity researchers have disclosed a maximum-severity vulnerability in n8n, a widely used workflow automation platform, that allows unauthenticated attackers to gain complete control over vulnerable instances. The flaw, tracked as CVE-2026-21858 and named Ni8mare by Cyera Research Labs, carries a CVSS score of 10.0. Security researcher Dor Attias discovered and reported the issue on November 9, 2025. Unauthenticated Exploit Lets Attackers Access Sensitive […]
Critical n8n Vulnerability (CVSS 10.0) Lets Unauthenticated Attackers Take Full Control Read More »









