# CVE-2026-56775: n8n - Incorrect OAuth Scope Validation in Evaluation Test Runs Endpoints

> CVE-2026-56775: n8n - Incorrect OAuth Scope Validation in Evaluation Test Runs Endpoints. CVSS 5.4 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-56775
Last updated: 2026-07-08T19:31:35Z

- Published: 2026-07-08 13:49 UTC · Updated: 2026-07-08 19:31 UTC · Assigner: VulnCheck
- CVSS: 5.4 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
- EPSS: 0.30%, 23th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-863

## 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.

## Affected vendors and products

- n8n: n8n

## Tracked companies

- [n8n](https://rewindex.com/company/n8n.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-56775)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-56775)
- [https://github.com/n8n-io/n8n/security/advisories/GHSA-664h-gpgq-h6xx](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](https://www.vulncheck.com/advisories/n8n-incorrect-oauth-scope-validation-in-evaluation-test-runs-endpoints)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-56775 · Markdown: https://rewindex.com/cve/CVE-2026-56775.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-56775 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:12.264Z