Check Point Advisories

n8n Authentication Bypass (CVE-2026-59208)

Vulnerability
Protection

Check Point Reference:	CPAI-2026-9612
Date Published:	3 Aug 2026
Severity:	Medium
Last Updated:	Monday 03 August, 2026
Source:
Industry Reference:	CVE-2026-59208
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	n8n-io n8n 2.28.0 n8n-io n8n 2.27.4 and prior
Vulnerability Description	An authentication bypass vulnerability in n8n-io n8n allows attackers with a valid token from one trusted issuer to authenticate as a victim under another issuer.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the n8n Authentication Bypass (CVE-2026-59208) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Application Intelligence.
Attack Information: n8n Authentication Bypass (CVE-2026-59208)