CVE-2026-56360

Medium

Description

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.

SeverityMedium

CVSS4.0

Exploit probability—

Product

N8n

PublishedJul 8, 2026

First seenJul 8, 2026

Weakness typeCWE-290CWE-290

How to fix

Update

n8n n8n1.123.18, 2.6.2 or later
n8n1.123.18, 2.6.2 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-38c7-23hj-2wgq

Affected products

Product	Affected versions	Fixed in
n8n n8n	v < 1.123.18, 2.0.0 ≤ v < 2.6.2	1.123.18, 2.6.2
n8nnpm	v < 1.123.18, 2.0.0 ≤ v < 2.6.2	1.123.18, 2.6.2

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