VulnerabilityAnalyzed

CVE-2026-56353

n8n contains an authentication bypass in the Chat Trigger node when configured with n8n User Auth (a non-default configuration).

MEDIUM 6.3EPSS 0.33%

Does this matter?

Lower severity and a low EPSS score (0.33%). Track it; it rarely justifies an emergency change on its own.

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 4.0: 6.3 MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.33% probability · 26th percentile
CISA KEV: Not listed
Weakness: CWE-287
Affected: n8n/n8n
Source: disclosure@vulncheck.com

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-jh8h-6c9q-7gmwVendor Advisory
https://www.vulncheck.com/advisories/n8n-authentication-bypass-in-chat-trigger-nodeThird Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.