AI agent vulnerability · n8n

GHSA-664h-gpgq-h6xx: n8n: Wrong OAuth Scope on Evaluation Test Runs Endpoints

mediumCVSS 4.0 5.3 · 3.1 5.4

Impact Three mutating endpoints in the evaluation test runs controller authorized state-changing actions using workflow:read instead of the action-appropriate workflow:execute scope. An authenticated user with project:viewer role on a project could start new evaluation test runs, cancel in-flight runs, and delete run records for workflows they only had read access to.

Published Jun 17, 2026

Affected packages

n8n

Ecosystem: npm
Affected: < 1.123.55
Fixed in: 1.123.55
Check: npm ls n8n

n8n

Ecosystem: npm
Affected: >= 2.26.0, < 2.26.2
Fixed in: 2.26.2
Check: npm ls n8n

n8n

Ecosystem: npm
Affected: >= 2.0.0-rc.0, < 2.25.7
Fixed in: 2.25.7
Check: npm ls n8n

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

Impact

Three mutating endpoints in the evaluation test runs controller authorized state-changing actions using workflow:read instead of the action-appropriate workflow:execute scope. An authenticated user with project:viewer role on a project could start new evaluation test runs, cancel in-flight runs, and delete run records for workflows they only had read access to.

This issue only affects instances with Advanced Permissions (Enterprise/Cloud) where projects and viewer roles are in use.

Patches

The issue has been fixed in n8n versions 1.123.55, 2.25.7, and 2.26.2. Users should upgrade to one of these versions or later to remediate the vulnerability.

Workarounds

If upgrading is not immediately possible, administrators should consider the following temporary mitigations:

Restrict project membership to fully trusted users only.
Avoid granting viewer access to projects containing sensitive workflows.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

Credited to YLChen-007.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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