What’s Vulnerable › Vulnerabilities

CVE-2026-56353: n8n - Authentication Bypass in Chat Trigger Node

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-15 · updated 2026-10-24
• Weakness: CWE-287

Description

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.

Affected products

• n8n-io n8n: before 1.123.22; from 2.0.0 before 2.9.3; 2.10.0 — fixed in 1.123.22, 2.9.3

How to fix

Upgrade to a fixed version: n8n-io n8n 1.123.22, 2.9.3. Check the vendor advisory for mitigations.

References

• https://github.com/n8n-io/n8n/security/advisories/GHSA-jh8h-6c9q-7gmw
• https://www.vulncheck.com/advisories/n8n-authentication-bypass-in-chat-trigger-node

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