Vulnerability Description
n8n before 1.123.55, 2.25.7, and 2.26.2 contains an authorization vulnerability in three mutating evaluation test-run endpoints that authorize state-changing actions using the workflow:read scope instead of the action-appropriate workflow:execute scope. On instances using Advanced Permissions (Enterprise/Cloud) with projects and viewer roles, an authenticated user with the project:viewer role can start new evaluation test runs, cancel in-flight runs, and delete run records for workflows they only have read access to.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| N8N | N8N | < 1.123.55 |
Related Weaknesses (CWE)
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-664h-gpgq-h6xxMitigationVendor Advisory
- https://www.vulncheck.com/advisories/n8n-incorrect-oauth-scope-validation-in-evaThird Party Advisory
FAQ
What is CVE-2026-56775?
CVE-2026-56775 is a vulnerability with a CVSS score of 5.4 (MEDIUM). n8n before 1.123.55, 2.25.7, and 2.26.2 contains an authorization vulnerability in three mutating evaluation test-run endpoints that authorize state-changing actions using the workflow:read scope inst...
How severe is CVE-2026-56775?
CVE-2026-56775 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-56775?
Check the references section above for vendor advisories and patch information. Affected products include: N8N N8N.