CVE-2026-65014
n8n before 2.28.0 Authentication Bypass via test-webhook
- State
- Published
- Severity
- 6.3 Medium
- Published
- Jul 22, 2026
- Updated
- Oct 29, 2026
- Reserved
- Jul 21, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | VulnCheck |
Weaknesses
- CWE-306 Missing Authentication for Critical Function
Affected Products
| Product | Versions |
|---|---|
n8nn8n-io |
|
References
- GitHub Security Advisory (GHSA-33q9-f52j-gc75)vendor-advisory
- VulnCheck Advisory: n8n before 2.28.0 Authentication Bypass via test-webhookthird-party-advisory
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