CVE-2026-56353 | n8n contains an authentication bypass in the Chat Trigger no… | CVSS 4.8 MEDIUM

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.

Metadata

CVE ID: CVE-2026-56353
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-20 18:13 UTC
Published: 2026-07-15 11:25 UTC
Last updated: 2026-07-15 11:25 UTC
Primary CWE: CWE-287
Improper Authentication
Vendor / Product: n8n / n8n
Sources: cve.org · NVD

Severity & Metrics

4.8 MEDIUM CVSS 3.1

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products (1)

Vendor	Product	Platform	Versions
n8n	n8n	—	0 < 1.123.22, 1.123.22, 2.0.0 < 2.9.3, 2.9.3 …

Weakness (CWE)

CWE	Source	Description
CWE-287	cna	Improper Authentication

CVSS scores (2)

Score	Severity	Version	Source	Vector
6.3	MEDIUM	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
4.8	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

References (2)

GitHub Security Advisory (GHSA-jh8h-6c9q-7gmw) https://github.com/n8n-io/n8n/security/advisories/GHSA-jh8h-6c9q-7gmw
VulnCheck Advisory: n8n - Authentication Bypass in Chat Trigger Node https://www.vulncheck.com/advisories/n8n-authentication-bypass-in-chat-trigger-node