CVE-2026-65014
n8n before 2.28.0 Authentication Bypass via test-webhook
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
n8n before 2.28.0 (and before 2.27.4 on the 2.27.x branch) registers the DELETE /${restEndpoint}/test-webhook/:id endpoint before authentication middleware is applied, allowing any unauthenticated network caller who knows a workflow ID to cancel that workflow's active test webhook registration. The impact is limited to disrupting in-progress test sessions; production webhooks, persistent workflow state, and stored data are not affected.
| CWE | CWE-306 |
| Vendor | n8n-io |
| Product | n8n |
| Published | Jul 22, 2026 |
| Last Updated | Jul 22, 2026 |
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Affected Versions
n8n-io / n8n
0 < 2.28.0
n8n-io / n8n
0 < 2.27.4