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TI-2026-46452 Aliases CVE-2026-65014GHSA-33q9-f52j-gc75

n8n before 2.28.0 Authentication Bypass via test-webhook

Priority LOW 29CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0059 48th percentileScored 2026-11-07
Fix Fixed n8n (n8n-io): 2.27.4, 2.28.0n8n (npm): 2.27.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
n8nn8nbefore 2.27.42.27.4, 2.28.0Patch availableCNA
—n8n (npm)before 2.27.42.27.4Patch availableGHSA-33q9-f52j-gc75
  • n8n Vendorn8n Affected before 2.27.4 Fixed in 2.27.4, 2.28.0 Patch available CNA
  • n8n (npm) Vendor— Affected before 2.27.4 Fixed in 2.27.4 Patch available GHSA-33q9-f52j-gc75

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:*2.27.0 to before 2.27.4Vulnerablen8n
cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:*2.27.0 to before 2.27.4Vulnerablen8n
  • cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:* Versions 2.27.0 to before 2.27.4 Vulnerable ·n8n
  • cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:* Versions 2.27.0 to before 2.27.4 Vulnerable ·n8n

Remediation

  • Fix · CNA n8n (n8n-io) Fixed in 2.27.4, 2.28.0
  • Fix · GHSA-33q9-f52j-gc75 n8n (npm) Fixed in 2.27.4 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-65014
  2. 2026-10-03 Alias added: GHSA-33q9-f52j-gc75
  3. 2026-10-29 Affected versions changed · CNA

References

Advisory 2

Other 3

  • TI-2025-42131 n8n Vulnerable to Remote Code Execution via Expression Injection KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-17560 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling CVSS 3.1CRITICAL 10.0
  • TI-2026-01167 Authenticated users can bypass the Expression sandbox mechanism to achieve full remote… CVSS 3.1CRITICAL 9.9
  • TI-2026-00644 Sandbox escape in n8n Python task runner allows for arbitrary code execution on the underlying host. CVSS 3.1CRITICAL 9.9
  • TI-2025-35293 An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3… CVSS 3.1HIGH 8.8
  • TI-2023-12275 The n8n package 0.218.0 for Node.js allows Escalation of Privileges. CVSS 3.1HIGH 8.8
See all 178 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences