CVE-2026-56360 — MEDIUM (4.0)

Q: How severe is CVE-2026-56360?

CVE-2026-56360 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-56360?

Check the references section above for vendor advisories and patch information. Affected products include: N8N N8N.

Vulnerability 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.

CVSS Score

4.0

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

NONE

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
N8N	N8N	< 1.123.18

Related Weaknesses (CWE)

CWE-290

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-38c7-23hj-2wgqMitigationVendor Advisory
https://www.vulncheck.com/advisories/n8n-webhook-forgery-via-unsigned-post-requeThird Party Advisory

FAQ

What is CVE-2026-56360?

CVE-2026-56360 is a vulnerability with a CVSS score of 4.0 (MEDIUM). 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 trig...

How severe is CVE-2026-56360?

CVE-2026-56360 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-56360?

Check the references section above for vendor advisories and patch information. Affected products include: N8N N8N.