PT-2026-56441 · N8N · N8N

Ylchen-007 · Published 2026-07-08 · Updated 2026-07-08 · CVE-2026-56775

NVD

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

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.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-56775

Affected Products

N8N

References · 3

• https://github.com/n8n-io/n8n/security/advisories/GHSA-664h-gpgq-h6xx · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-56775 · Security Note
• https://vulncheck.com/advisories/n8n-incorrect-oauth-scope-validation-in-evaluation-test-runs-endpoints · Note