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TI-2026-74539 Aliases CVE-2026-110849

n8n Stored XSS via Binary-Data File Preview

Priority LOW 33CWE-79Published · Updated

Key facts

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

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

Summary

n8n before 1.123.83, from 2.0.0 before 2.41.4, and from 2.42.0 before 2.42.1 contains a stored cross-site scripting flaw (CWE-79) in the file-preview modal. The modal republishes binary data as an unsandboxed same-origin blob URL, so a crafted item uploaded by a member can run script in the n8n origin. A member with low privileges can exploit this, and the script runs in the origin of whoever previews the file, typically the owner, acting with their session.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

n8n before 1.123.83, 2.41.4, and 2.42.1 contains a stored cross-site scripting vulnerability in the file-preview modal, which re-publishes binary data as an unsandboxed same-origin blob URL. A member who uploads a crafted item can run script in the n8n origin of whoever previews it, typically the owner, and act with their session.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00243 15th percentileScored 2026-11-07
Fix Fixed n8n (n8n-io): 1.123.83, 2.41.4, 2.42.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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 1.123.83; 2.0.0 to before 2.41.4; 2.42.0 to before 2.42.11.123.83, 2.41.4, 2.42.1Patch availableCNA
  • n8n Vendorn8n Affected before 1.123.83; 2.0.0 to before 2.41.4; 2.42.0 to before 2.42.1 Fixed in 1.123.83, 2.41.4, 2.42.1 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*——n8n
  • cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:* Versions — — ·n8n

Remediation

Upgrade n8n to 1.123.83, 2.41.4, or 2.42.1, depending on the release line in use.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA n8n (n8n-io) Fixed in 1.123.83, 2.41.4, 2.42.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    n8n-io n8n 1.123.83, 2.41.4, 2.42.1

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2026-74535 Code execution in n8n Git node Log operationPriority LOW 36
    • TI-2026-74537 Stored cross-site scripting in n8n Chat Trigger customCssPriority LOW 31
    • TI-2026-74542 Authentication bypass in n8n allows unauthenticated workflow executionPriority LOW 28
    Show all 5 records →

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-110849
  2. 2026-10-15 CISA SSVC decision points changed
  3. 2026-10-15 Priority changed: MEDIUM → LOW

References

Advisory 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-2026-82991 Code execution in n8n via deprecated Function nodes CVSS 4.0HIGH 8.7
  • TI-2025-35293 An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3… CVSS 3.1HIGH 8.8
See all 233 →

Sources

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