Auth bypass in N8n
CVE-2026-56776
n8n before 1.123.55, 2.25.7, and 2.26.2 contains an authorization bypass in the POST /workflows/{workflowId}/test-runs/new endpoint, which authorizes access using the workflow:read scope instead of workflow:execute. An authenticated user w…
Vulnerability class: Broken Access Control
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L.
Affected products
- N8n — versions 0, 1.123.55, 2.26.2
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory, Mitigation, Vendor Advisory)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-56776?
- CVE-2026-56776 is a high-severity vulnerability in N8n, classified under Incorrect Authorization. CVSS score: 7.4/10. Published 2026-07-08.
- How severe is CVE-2026-56776?
- High severity. CVSS v3 base score is 7.4 out of 10.