Cybersecurity researchers have disclosed details of yet another maximum-severity security flaw in n8n, a popular workflow automation platform, that allows an unauthenticated remote attacker to gain complete control over susceptible instances. The vulnerability, tracked as CVE-2026-21858 (CVSS score: 10.0), has been codenamed Ni8mare by Cyera Research Labs. Security researcher Dor Attias has been
In cybersecurity, this highlights the growing attack surface presented by automation tools used in AI and the need for security solutions tailored to protect these platforms. Security vendors should prioritize developing tools and services that can detect and prevent attacks targeting workflow automation systems used in AI/ML.
Operational impact: Organizations utilizing n8n for AI/ML workflows must immediately patch the vulnerability and implement enhanced security measures, including stricter access controls and regular security audits. This may necessitate diverting resources from AI development to address security concerns, potentially delaying project timelines. Secure configuration and best practice adoption will become more critical for these AI pipelines.