Vulnerability Details CVE-2026-65014
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 24.9%
CVSS Severity
CVSS v3 Score 5.3
References