Medium severity · published Jul 15, 2026
CVE-2026-56353
n8n - Authentication Bypass in Chat Trigger Node
4.8
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N8
n8n · n8n
before 1.123.22; 2.0.0 before 2.9.3; 2.10.0 before 2.10.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56353
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56353
Vendor Advisory
https://github.com/n8n-io/n8n/security/advisories/GHSA-jh8h-6c9q-7gmw
Third Party Advisory
https://www.vulncheck.com/advisories/n8n-authentication-bypass-in-chat-trigger-node
More from n8n
8.8
CVE-2025-68613
n8n Vulnerable to Remote Code Execution via Expression Injection
10.0
CVE-2026-54309
n8n: n8n MCP Browser HTTP Transport Exposes Unauthenticated Browser-Control Sessions
10.0
CVE-2026-21858
n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
9.9
CVE-2026-85165
n8n before 2.36.2 Expression Sandbox Bypass via SpreadElement
9.9
CVE-2026-72765
n8n before 2.32.1 Remote Code Execution via Expression Sandbox Escape