PT-2026-56437 · N8N · N8N
CVSS v4.0
6.3
Medium
| Vector | AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N |
Name of the Vulnerable Software and Affected Versions
n8n versions prior to 1.123.18
n8n versions prior to 2.6.2
Description
The ZendeskTrigger node fails to verify HMAC-SHA256 signatures on Zendesk webhooks. This allows attackers who possess the webhook URL to send unsigned POST requests to trigger workflows using arbitrary malicious data. HMAC-SHA256 is a cryptographic hash function used to verify both the data integrity and the authenticity of a message.
Recommendations
Update to version 1.123.18 or later.
Update to version 2.6.2 or later.
Exploit
Fix
Authentication Bypass by Spoofing
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Weakness Enumeration
Related Identifiers
Affected Products
N8N