Auth bypass in N8n
CVE-2026-72771
n8n versions before 2.32.1 fail to enforce the Allowed HTTP Request Domains allowlist in multiple AI and LLM nodes when user-supplied base or endpoint URLs are configured. Low-privileged workflow editors with use-only access to shared credentials can redirect requests to attacker-controlled hosts and exfiltrate credential secrets for reuse against underlying services.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (26.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001
Affected products
- N8n — versions 2.32.0
- N8n-Io N8n — versions 0, 2.32.1, 2.31.5
Weakness classification (CWE)
References
- github.com/n8n-io/n8n/security/advisories/GHSA-64xh-79j6-r5v8 (vendor-advisory, Mitigation, Vendor Advisory)
- www.vulncheck.com/advisories/n8n-before-credential-restriction-bypass-via-ai-ll… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-72771?
- CVE-2026-72771 is a medium-severity vulnerability in N8n, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-08-11.
- How severe is CVE-2026-72771?
- Medium severity. CVSS v3 base score is 6.5 out of 10.