CVE-2026-56360

MEDIUM CVSS 4.0 View on NVD ↗

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 Vector

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

Affected Products

n8n/n8n

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-38c7-23hj-2wgq
https://www.vulncheck.com/advisories/n8n-webhook-forgery-via-unsigned-post-requests-in-zendesktrigger

Published: Jul 08, 2026 14:17 UTC Modified: Jul 08, 2026 19:32 UTC