CVE catalog
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 trig
- Severity
- Medium · CVSS 6.3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.31% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | n8n | Not reported | 1.123.18 | fixed |
| Cpe | n8n | Not reported | 2.6.2 | fixed |
| Cpe | n8n | Not reported | 2.6.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | n8n | cpe | Not reported | 1.123.18 | Not reported | Not reported | Not reported |
| Cpe | n8n | cpe | Not reported | 2.6.2 | Not reported | Not reported | Not reported |
| Cpe | n8n | cpe | Not reported | 2.6.2 | Not reported | NVD-CVE-2026-56360 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://github.com/n8n-io/n8n/security/advisories/GHSA-38c7-23hj-2wgq]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-56360]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0532.json]
- [https://www.vulncheck.com/advisories/n8n-webhook-forgery-via-unsigned-post-requests-in-zendesktrigger]
[CERT-Bund public advisories] · [FIRST EPSS] · [National Vulnerability Database (NVD)]