What is CVE-2026-56360?

CVE-2026-56360 is a medium-severity vulnerability in N8n, classified under Authentication Bypass by Spoofing. CVSS score: 4.0/10. Published 2026-07-08.

How severe is CVE-2026-56360?

Medium severity. CVSS v3 base score is 4.0 out of 10.

Vulnerability in N8n

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…

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N.

Affected products

N8n — versions 0, 1.123.18, 2.0.0

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

disclosure@vulncheck.com (vendor-advisory, Mitigation, Vendor Advisory)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-56360?: CVE-2026-56360 is a medium-severity vulnerability in N8n, classified under Authentication Bypass by Spoofing. CVSS score: 4.0/10. Published 2026-07-08.
How severe is CVE-2026-56360?: Medium severity. CVSS v3 base score is 4.0 out of 10.