CVE-2026-56353

Analyzed Analyzed - Analysis Complete

Authentication Bypass in n8n Chat Trigger Node

Publication date: 2026-07-15

Last updated on: 2026-07-16

Assigner: VulnCheck

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-15

Last Modified

2026-07-16

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-03

NVD

CVE-2026-56353

EUVD

EUVD-2026-44626

Affected Vendors & Products

Vendor	Product	Version / Range
n8n	n8n	to 1.123.22 (exc)
n8n	n8n	From 2.0.0 (inc) to 2.9.3 (exc)
n8n	n8n	2.10.0
n8n	n8n	2.10.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-287	When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Attack-Flow Graph

Executive Summary

This vulnerability is an authentication bypass in the Chat Trigger node of n8n software. It affects versions before 1.123.22, between 2.0.0 and 2.9.2, and version 2.10.0 when configured with n8n User Auth, which is not the default setting. Attackers can bypass authentication checks on the Chat Trigger webhook endpoint to gain unauthorized access without valid credentials.

Detection Guidance

Check if your n8n instance is running a vulnerable version (<1.123.22, 2.0.0-2.9.2, or 2.10.0) by running: n8n --version. Inspect Chat Trigger nodes in workflows for non-default n8n User Auth configuration. Monitor webhook endpoints for unauthorized access attempts or unusual activity.

Impact Analysis

This vulnerability allows unauthorized access to the Chat Trigger webhook endpoint, potentially leading to data breaches, unauthorized workflow execution, or compromise of sensitive information. Attackers could manipulate workflows or extract data without proper authentication.

Compliance Impact

This vulnerability may lead to unauthorized access to sensitive data, which could violate compliance requirements under GDPR, HIPAA, or other regulations. Unauthorized access risks data confidentiality and integrity, potentially resulting in legal and financial penalties.

Mitigation Strategies

Upgrade n8n to patched versions (1.123.22, 2.9.3, or 2.10.1) immediately. If upgrading is not possible, disable Chat Trigger nodes with n8n User Auth or restrict webhook access to trusted IPs. Review and audit workflow permissions to limit exposure.

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