Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| N8N | N8N | >= 1.65.0, < 1.121.0 |
Related Weaknesses (CWE)
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-v4pr-fm98-w9pgVendor Advisory
- https://www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-executioExploitThird Party Advisory
FAQ
What is CVE-2026-21858?
CVE-2026-21858 is a vulnerability with a CVSS score of 10.0 (CRITICAL). 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 ...
How severe is CVE-2026-21858?
CVE-2026-21858 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-21858?
Check the references section above for vendor advisories and patch information. Affected products include: N8N N8N.