Vulnerability-Lookup

GHSA-33Q9-F52J-GC75

Vulnerability from github – Published: 2026-07-22 22:36 – Updated: 2026-07-22 22:36

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.

Severity

6.3 (Medium)


                  
                    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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "n8n"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.27.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-65014"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-22T22:36:10Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Impact\nThe `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\u0027s active test webhook registration. \n\nThe impact is limited to disrupting in-progress test sessions. Production webhooks, persistent workflow state, and stored data are not affected.\n\n## Patches\nUsers should upgrade to the patched version once available to remediate the vulnerability.\n\n## Workarounds\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Restrict network access to the n8n instance to fully trusted users only.\n- Place the n8n instance behind a reverse proxy or firewall that requires authentication before reaching the REST API.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.",
  "id": "GHSA-33q9-f52j-gc75",
  "modified": "2026-07-22T22:36:10Z",
  "published": "2026-07-22T22:36:10Z",
  "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": "PACKAGE",
      "url": "https://github.com/n8n-io/n8n"
    },
    {
      "type": "WEB",
      "url": "https://github.com/n8n-io/n8n/releases/tag/n8n@2.27.4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/n8n-io/n8n/releases/tag/n8n@2.28.0"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/n8n-before-authentication-bypass-via-test-webhook"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "n8n: Unauthenticated Endpoint Allows Cancellation of Any User\u0027s Active Test Webhook"
}

CVE-2026-65014 (GCVE-0-2026-65014)

Vulnerability from cvelistv5 – Published: 2026-07-22 11:21 – Updated: 2026-07-22 12:26

Title

n8n before 2.28.0 Authentication Bypass via test-webhook

Summary

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.

Severity

6.3 (Medium)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/n8n-io/n8n/security/advisories…	vendor-advisory
https://www.vulncheck.com/advisories/n8n-before-a…	third-party-advisory

Impacted products

2 products

Vendor	Product	Version
n8n-io	n8n	Affected: 0 , < 2.28.0 (semver) Unaffected: 2.28.0 (semver)
n8n-io	n8n	Affected: 0 , < 2.27.4 (semver) Unaffected: 2.27.4 (semver)

Date Public

2026-07-08 00:00

Show details on NVD website

JSON

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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-22T12:24:45.898740Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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