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TI-2026-26128 Aliases CVE-2026-33749GHSA-qfc3-hm4j-7q77

n8n Vulnerable to XSS via Binary Data Inline HTML Rendering

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

n8n is an open source workflow automation platform. Prior to versions 1.123.27, 2.13.3, and 2.14.1, an authenticated user with permission to create or modify workflows could craft a workflow that produces an HTML binary data object without a filename. The `/rest/binary-data` endpoint served such responses inline on the n8n origin without `Content-Disposition` or `Content-Security-Policy` headers, allowing the HTML to render in the browser with full same-origin JavaScript access. By sending the resulting URL to a higher-privileged user, an attacker could execute JavaScript in the victim's authenticated session, enabling exfiltration of workflows and credentials, modification of workflows, or privilege escalation to admin. The issue has been fixed in n8n versions 1.123.27, 2.13.3, and 2.14.1. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations: Limit workflow creation and editing permissions to fully trusted users only, and/or restrict network access to the n8n instance to prevent untrusted users from accessing binary data URLs. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00254 16th percentileScored 2026-11-07
Fix Fixed n8n (n8n-io): 1.123.27, 2.13.3n8n (npm): 1.123.27, 2.14.1, 2.13.3

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 1.123.27; 2.0.0-rc.0 to before 2.13.3; = 2.14.01.123.27, 2.13.3Patch availableCNA
—n8n (npm)before 1.123.271.123.27Patch availableGHSA-qfc3-hm4j-7q77
—n8n (npm)2.14.0 to before 2.14.12.14.1Patch availableGHSA-qfc3-hm4j-7q77
—n8n (npm)2.0.0-rc.0 to before 2.13.32.13.3Patch availableGHSA-qfc3-hm4j-7q77
  • n8n Vendorn8n Affected before 1.123.27; 2.0.0-rc.0 to before 2.13.3; = 2.14.0 Fixed in 1.123.27, 2.13.3 Patch available CNA
  • n8n (npm) Vendor— Affected before 1.123.27 Fixed in 1.123.27 Patch available GHSA-qfc3-hm4j-7q77
  • n8n (npm) Vendor— Affected 2.14.0 to before 2.14.1 Fixed in 2.14.1 Patch available GHSA-qfc3-hm4j-7q77
  • n8n (npm) Vendor— Affected 2.0.0-rc.0 to before 2.13.3 Fixed in 2.13.3 Patch available GHSA-qfc3-hm4j-7q77

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*before 1.123.27; 2.0.0 to before 2.13.3Vulnerablen8n
cpe:2.3:a:n8n:n8n:2.14.0:*:*:*:*:node.js:*:*2.14.0Vulnerablen8n
  • cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:* Versions before 1.123.27; 2.0.0 to before 2.13.3 Vulnerable ·n8n
  • cpe:2.3:a:n8n:n8n:2.14.0:*:*:*:*:node.js:*:* Versions 2.14.0 Vulnerable ·n8n

Remediation

  • Fix · CNA n8n (n8n-io) Fixed in 1.123.27, 2.13.3
  • Fix · GHSA-qfc3-hm4j-7q77 n8n (npm) Fixed in 1.123.27 Advisory →
  • Fix · GHSA-qfc3-hm4j-7q77 n8n (npm) Fixed in 2.14.1 Advisory →
  • Fix · GHSA-qfc3-hm4j-7q77 n8n (npm) Fixed in 2.13.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33749
  2. 2026-10-03 Alias added: GHSA-qfc3-hm4j-7q77

References

Advisory 2

Other 1

  • 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