PT-2026-56437 · N8N · N8N

Jjjutla + 1 · Published 2026-07-08 · Updated 2026-07-08 · CVE-2026-56360

NVD

CVSS v3.1

4.0

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

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.

Fix

Authentication Bypass by Spoofing

Weakness Enumeration

CWE-290

Related Identifiers

CVE-2026-56360

Affected Products

N8N

References · 3

• https://github.com/n8n-io/n8n/security/advisories/GHSA-38c7-23hj-2wgq · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-56360 · Security Note
• https://vulncheck.com/advisories/n8n-webhook-forgery-via-unsigned-post-requests-in-zendesktrigger · Note