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.
- Score
- CVSS 4.0 6.3 Medium
- Status
- Analyzed - disclosure@vulncheck.com
- Published
- 2026-07-22
- Last modified
- 2026-10-24
- Weaknesses
- CWE-306
Affected products
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-33q9-f52j-gc75
- https://www.vulncheck.com/advisories/n8n-before-authentication-bypass-via-test-webhook
