| Component | n8n |
| Severity | medium (CVSS 5.4) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
| Published (NVD) | 2026-07-08 |
| Affected versions | n8n < 1.123.55 n8n >= 2.0.0, < 2.25.7 n8n >= 2.26.0, < 2.26.2 |
| Fixed in | 1.123.55, 2.25.7, 2.26.2 |
| Weakness | CWE-863 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade n8n to
1.123.55or later (or the patched release of your branch: 2.25.7, 2.26.2). - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-56775
- https://github.com/n8n-io/n8n/security/advisories/GHSA-664h-gpgq-h6xx
- https://www.vulncheck.com/advisories/n8n-incorrect-oauth-scope-validation-in-evaluation-test-runs-endpoints
Read more
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