CVE-2026-56360

n8n before versions 1.123.18 and 2.6.2 fails to verify HMAC-SHA256 signatures on Zendesk webhooks in the ZendeskTrigger node. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary malicious data.

CVSS v3 4.0 MEDIUM

4.0^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/n8n-io/n8n/security/advisories/GHSA-38c7-23hj-2wgq	Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/n8n-webhook-forgery-via-unsigned-post-requests-in-zendesktrigger	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:n8n:n8n::::::node.js::*
	cpe:2.3:a:n8n:n8n::::::node.js::*

History

25 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) n8n antes de las versiones 1.123.18 y 2.6.2 falla al verificar las firmas HMAC-SHA256 en los webhooks de Zendesk en el nodo ZendeskTrigger. Atacantes que conocen la URL del webhook pueden enviar solicitudes POST sin firmar para activar flujos de trabajo con datos maliciosos arbitrarios.

Information

Published : 2026-07-08 14:17

Updated : 2026-10-25 20:10

NVD link : CVE-2026-56360

Mitre link : CVE-2026-56360

CVE.ORG link : CVE-2026-56360

JSON object : View

Products Affected

n8n

n8n

CWE

CWE-290

Authentication Bypass by Spoofing

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