GHSA-h9fm-xcv2-qfw3: Duplicate Advisory Unauthenticated Endpoint Allows Cancellation Of Vulnerability

MODERATE
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CWE-306
Published
Advisory Summary

GHSA-h9fm-xcv2-qfw3 is a MODERATE unauthenticated endpoint allows cancellation of vulnerability (CWE-306: Missing Authentication for Critical Function) affecting Duplicate Advisory libraries in the npm ecosystem. The issue involves unauthenticated endpoint allows cancellation of any user's active test webhook. Remediation is available in the latest vendor maintenance releases.

GHSA-h9fm-xcv2-qfw3 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-h9fm-xcv2-qfw3
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-306: Missing Authentication for Critical Function
Affected Product Duplicate Advisory
Package Ecosystem npm
Published Date
Last Updated

How to Fix GHSA-h9fm-xcv2-qfw3

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

n8n fixed: Latest secure release 
npm install n8n@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls n8n

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-h9fm-xcv2-qfw3, inspect your project dependencies using npm:

npm ls n8n

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls n8n command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-306: Missing Authentication for Critical Function, where the product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## 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.

GHSA-h9fm-xcv2-qfw3 Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
n8n
npm/n8n
npm

References

GitHub Advisory / Wiki ADVISORY
https://github.com/n8n-io/n8n/security/advisories/GHSA-33q9-f52j-gc75
NVD — GHSA-h9fm-xcv2-qfw3 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-65014
www.vulncheck.com/advisories/n8n-befo... WEB
https://www.vulncheck.com/advisories/n8n-before-authentication-bypass-via-test-webhook

Frequently Asked Questions

What is GHSA-h9fm-xcv2-qfw3?
GHSA-h9fm-xcv2-qfw3 is a security vulnerability in Duplicate Advisory involving Unauthenticated Endpoint Allows Cancellation of Any User's Active Test Webhook under CWE-306: Missing Authentication for Critical Function.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: n8n.
What version fixes GHSA-h9fm-xcv2-qfw3?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is n8n affected?
Yes, n8n is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with GHSA-h9fm-xcv2-qfw3?
GHSA-h9fm-xcv2-qfw3 is classified under CWE-306: Missing Authentication for Critical Function (The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.).
How can I check npm dependencies for GHSA-h9fm-xcv2-qfw3?
Run the dependency tree command: 'npm ls n8n'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-h9fm-xcv2-qfw3",
  "modified" : "2026-07-22T22:32:48Z",
  "published" : "2026-07-22T12:32:17Z",
  "withdrawn" : "2026-07-22T22:32:48Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Unauthenticated Endpoint Allows Cancellation of Any User's Active Test Webhook",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-33q9-f52j-gc75. This link is maintained to preserve external references.\n\n## Original Description\n\nn8n 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.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "n8n"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 2.27.4"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/security/advisories/GHSA-33q9-f52j-gc75"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-65014"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/n8n-before-authentication-bypass-via-test-webhook"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-306" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-22T22:32:48Z",
    "nvd_published_at" : "2026-07-22T12:18:18Z"
  }
}