Auth bypass in N8n
CVE-2026-56353
n8n contains an authentication bypass in the Chat Trigger node when configured with n8n User Auth (a non-default configuration). In affected releases — before 1.123.22, the 2.0.0 through 2.9.2 line, and 2.10.0 — the authentication check on the Chat Trigger webhook endpoint can be circumvented, allowing access without valid credentials. Fixed in 1.123.22, 2.9.3, and 2.10.1.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (24.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- N8n — versions 0, 1.123.22, 2.0.0
Weakness classification (CWE)
References
- github.com/n8n-io/n8n/security/advisories/GHSA-jh8h-6c9q-7gmw (vendor-advisory, Vendor Advisory)
- www.vulncheck.com/advisories/n8n-authentication-bypass-in-chat-trigger-node (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-56353?
- CVE-2026-56353 is a medium-severity vulnerability in N8n, classified under Improper Authentication. CVSS score: 4.8/10. Published 2026-07-15.
- How severe is CVE-2026-56353?
- Medium severity. CVSS v3 base score is 4.8 out of 10.