Detections
Analytics
CVE-2026-21858
critical
Description
n8n is an open source workflow automation platform. Versions starting with 1.65.0 and below 1.121.0 enable an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker, resulting in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. This issue is fixed in version 1.121.0.
References
https://www.databreachtoday.com/no-rest-in-2026-as-patch-alerts-amass-for-cisco-hpe-n8n-a-30482
https://www.theregister.com/2026/01/08/n8n_rce_bug/
https://www.securityweek.com/critical-vulnerability-exposes-n8n-instances-to-takeover-attacks/
https://www.infosecurity-magazine.com/news/maximum-severity-ni8mare-bug/
https://thehackernews.com/2026/01/critical-n8n-vulnerability-cvss-100.html
Details
Published: 2026-01-08
Updated: 2026-01-12
Named Vulnerability: Ni8mare
Risk Information
CVSS v2
Base Score: 9.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N
Severity: High
CVSS v3
Base Score: 10
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Severity: Critical
EPSS
EPSS: 0.0003
Vulnerability Watch
Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.
Vulnerability Being Monitored