AI Threat Alert
CVE-2026-56360
MEDIUMn8n 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...
Full CISO analysis pending enrichment.
How severe is it?
What is the attack surface?
What should I do?
No patch available
Monitor for updates. Consider compensating controls or temporary mitigations.
Which compliance frameworks are affected?
Compliance analysis pending. Sign in for full compliance mapping when available.
Frequently Asked Questions
What is 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.
Is CVE-2026-56360 actively exploited?
No confirmed active exploitation of CVE-2026-56360 has been reported, but organizations should still patch proactively.
How to fix CVE-2026-56360?
No patch is currently available. Monitor vendor advisories for updates.
What is the CVSS score for CVE-2026-56360?
CVE-2026-56360 has a CVSS v3.1 base score of 4.0 (MEDIUM).
What are the technical details?
Original Advisory
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.
Weaknesses (CWE)
CWE-290 — Authentication Bypass by Spoofing: This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
Source: MITRE CWE corpus.
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N