Vulnerability Description
n8n is an open source workflow automation platform. In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service. This could result in full compromise and can impact both self-hosted and n8n Cloud instances. This issue is fixed in version 1.121.3. Administrators can reduce exposure by disabling the Git node and limiting access for untrusted users, but upgrading to the latest version is recommended.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| N8N | N8N | >= 0.123.0, < 1.121.3 |
Related Weaknesses (CWE)
References
- https://github.com/n8n-io/n8n/commit/f4b009d00d1f4ba9359b8e8f1c071e3d910a55f6Patch
- https://github.com/n8n-io/n8n/security/advisories/GHSA-v364-rw7m-3263Vendor Advisory
FAQ
What is CVE-2026-21877?
CVE-2026-21877 is a vulnerability with a CVSS score of 9.9 (CRITICAL). n8n is an open source workflow automation platform. In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service. This could result in full comp...
How severe is CVE-2026-21877?
CVE-2026-21877 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-21877?
Check the references section above for vendor advisories and patch information. Affected products include: N8N N8N.