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TI-2026-58878 Aliases CVE-2026-86073GHSA-cw9w-vv67-hf73

n8n: Per-Resource OAuth Consent Bypass via Unbound Refresh Token Resource Substitution

Priority LOW 27CWE-863Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.

Summary

n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.1, the OAuth token endpoint bound an authorization code's first access token to the consented resource but did not bind its refresh token. Refreshing checked only that the requested resource was registered, not that it matched the original grant. An OAuth client approved for one workflow could substitute a different workflow URL in the resource parameter and obtain a valid token for an unapproved workflow accessible to the consenting user. This issue is fixed in versions 2.37.7 and 2.38.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0039 33rd percentileScored 2026-11-07
Fix Fixed n8n (n8n-io): 2.37.7, 2.38.1n8n (npm): 2.38.1, 2.37.7

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 2.37.7; 2.38.0 to before 2.38.12.37.7, 2.38.1Patch availableCNA
—n8n (npm)2.38.0 to before 2.38.12.38.1Patch availableGHSA-cw9w-vv67-hf73
—n8n (npm)before 2.37.72.37.7Patch availableGHSA-cw9w-vv67-hf73
  • n8n Vendorn8n Affected before 2.37.7; 2.38.0 to before 2.38.1 Fixed in 2.37.7, 2.38.1 Patch available CNA
  • n8n (npm) Vendor— Affected 2.38.0 to before 2.38.1 Fixed in 2.38.1 Patch available GHSA-cw9w-vv67-hf73
  • n8n (npm) Vendor— Affected before 2.37.7 Fixed in 2.37.7 Patch available GHSA-cw9w-vv67-hf73

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*before 2.37.7Vulnerablen8n
cpe:2.3:a:n8n:n8n:2.38.0:*:*:*:*:node.js:*:*2.38.0Vulnerablen8n
  • cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:* Versions before 2.37.7 Vulnerable ·n8n
  • cpe:2.3:a:n8n:n8n:2.38.0:*:*:*:*:node.js:*:* Versions 2.38.0 Vulnerable ·n8n

Remediation

  • Fix · CNA n8n (n8n-io) Fixed in 2.37.7, 2.38.1
  • Fix · GHSA-cw9w-vv67-hf73 n8n (npm) Fixed in 2.38.1 Advisory →
  • Fix · GHSA-cw9w-vv67-hf73 n8n (npm) Fixed in 2.37.7 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-86073
  2. 2026-10-03 Alias added: GHSA-cw9w-vv67-hf73

References

Patch 2

Advisory 2

Other 5

  • 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