---
id: GHSA-h9fm-xcv2-qfw3
title: >-
  Duplicate Advisory: Unauthenticated Endpoint Allows Cancellation of Any User's
  Active Test Webhook
summary: >-
  Duplicate Advisory: Unauthenticated Endpoint Allows Cancellation of Any User's
  Active Test Webhook
severity: medium
cwe:
  - CWE-306
vendor: n8n
product: n8n
ecosystem: npm
affected:
  - n8n < 2.27.4
published: '2026-07-22'
updated: '2026-07-22'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-h9fm-xcv2-qfw3'
references:
  - url: 'https://github.com/n8n-io/n8n/security/advisories/GHSA-33q9-f52j-gc75'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65014'
  - url: >-
      https://www.vulncheck.com/advisories/n8n-before-authentication-bypass-via-test-webhook
  - url: 'https://github.com/advisories/GHSA-h9fm-xcv2-qfw3'
tags:
  - ghsa
  - npm
ingestedAt: '2026-07-22T23:07:33.655Z'
---

## Overview

## Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-33q9-f52j-gc75. This link is maintained to preserve external references.

## Original 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.

## Affected packages

- `n8n < 2.27.4`

## Remediation

Refer to the advisory for the patched release.