Ni8mare  -  Unauthenticated Remote Code Execution in n8n (CVE-2026-21858)

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Cyera Research Labs has discovered a "worst-case scenario" flaw in n8n, the industry-leading platform for AI and workflow automation. Dubbed "Ni8mare," this vulnerability (CVE-2026-21858) allows an unauthenticated remote attacker to gain full administrative control over an n8n instance.