Auth bypass in N8n
CVE-2026-65596
n8n before 1.123.64, 2.29.8, and 2.30.1 fails to enforce the "Allowed HTTP Request Domains" restriction on HTTP-based credentials (Header Auth, Basic Auth, Query Auth, OAuth) in the GraphQL node, unlike the HTTP Request node. An authenticated user able to create or edit workflows can point the node's endpoint at a server they control and exfiltrate restricted credentials. Only instances where a credential has "Allowed HTTP Request Domains" configured and is usable by non-owner users are affected.
Vulnerability class: Broken Access Control
EPSS: 0.002 (11.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
- N8n — versions 2.30.0
- N8n-io N8n — versions 0, 1.123.64, 2.30.1
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-2026-65596?
- CVE-2026-65596 is a high-severity vulnerability in N8n, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-07-22.
- How severe is CVE-2026-65596?
- High severity. CVSS v3 base score is 8.1 out of 10.