n8n: Unauthenticated Endpoint Allows Cancellation of Any User's Active Test Webhook
- Product
- n8n
- CVE
- CVE-2026-65014
- Affected
- n8n < 2.27.4
- Fixed in
- 2.27.4
Last verified against sources: October 26, 2026
Am I affected?
n8n: affected n8n < 2.27.4. Fixed in 2.27.4.
- Check your version: run
npm ls n8n. Versions < 2.27.4 of n8n are affected. [1]
What to do now
- Upgrade to the fixed version: run
npm install n8n@2.27.4(first patched version 2.27.4). [1] - Restrict network access to the n8n instance to fully trusted users only. [1]
- Place the n8n instance behind a reverse proxy or firewall that requires authentication before reaching the REST API. [1]
General practice, not from the source: if the affected software could read tokens or credentials, rotate them after upgrading; pin versions and review changes before updating tools your agents run.
What happened
Impact
What was done
Sources
- GHSA-33q9-f52j-gc75 — GitHub Advisory Database
Every statement above was checked against these sources before publishing. Spotted an error? Tell us and we will correct it with a dated note.
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Copy a plain-text summary for Slack, GitHub issues, or team security channels.
[CVE-2026-65014] n8n: Unauthenticated Endpoint Allows Cancellation of Any User's Active Test Webhook
Product: n8n | Affected: n8n < 2.27.4 | Fixed in: 2.27.4
Summary: The `DELETE /${restEndpoint}/test-webhook/:id` route is registered before the authentication middleware is applied.
Source & remediation on AgentArmorHQ: https://agentarmorhq.com/incidents/2026/07/cve-2026-65014-n8nCorrections
Report an error or request a correction. We review requests within 5 business days and add a dated correction note.
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