GHSA-33q9-f52j-gc75

Suggest an improvement
Source
https://github.com/advisories/GHSA-33q9-f52j-gc75
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-33q9-f52j-gc75/GHSA-33q9-f52j-gc75.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-33q9-f52j-gc75
Aliases
Downstream
Published
2026-07-22T22:36:10Z
Modified
2026-07-22T22:56:43Z
Severity
  • 6.3 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
n8n: Unauthenticated Endpoint Allows Cancellation of Any User's Active Test Webhook
Details

Impact

The DELETE /${restEndpoint}/test-webhook/:id route is registered before the 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.

Patches

Users should upgrade to the patched version once available to remediate the vulnerability.

Workarounds

If upgrading is not immediately possible, administrators should consider the following temporary mitigations:

  • Restrict network access to the n8n instance to fully trusted users only.
  • Place the n8n instance behind a reverse proxy or firewall that requires authentication before reaching the REST API.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

Database specific 
{
    "cwe_ids":  [
        "CWE-306"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-07-22T22:36:10Z",
    "nvd_published_at":  null,
    "severity":  "MODERATE"
}
References

Affected packages

npm / n8n

Package

Name
n8n
View open source insights on deps.dev
Purl
pkg:npm/n8n

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.27.4

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-33q9-f52j-gc75/GHSA-33q9-f52j-gc75.json"