VDB
CVE-2026-56357
CVE-2026-56357
PUBLISHED
CVSS 6.3 MEDIUM
Reported by VulnCheck · Published June 22, 2026
n8n before 1.123.15 and 2.5.0 contains a webhook forgery vulnerability in the GitHub Webhook Trigger node that fails to implement HMAC-SHA256 signature verification. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary data, spoofing GitHub webhook events.
Risk Scores
CVSS 4.0
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
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| n8n | n8n | 0, 1.123.15, 2.0.0 |
| n8n | n8n | 0, 1.123.15, 2.0.0 |
Timeline
- Feb 26, 2026 CVE Published
- Jun 23, 2026 EPSS Score
- Jun 23, 2026 Coalition ESS Score
- Jun 24, 2026 Security Advisory