| Component | n8n |
| Severity | medium (CVSS 4) |
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N |
| Published (NVD) | 2026-07-08 |
| Affected versions | n8n < 1.123.18 n8n >= 2.0.0, < 2.6.2 |
| Fixed in | 1.123.18, 2.6.2 |
| Weakness | CWE-290 |
| CISA KEV | not listed |
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.
What to do
- Upgrade n8n to
1.123.18or later (or the patched release of your branch: 2.6.2). - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-56360
- 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
Read more
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