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OFFICIAL CVE RECORD5.1 Medium

CVE-2026-56356

n8n - Stored Cross-Site Scripting in Chat Trigger Node Custom CSS Field

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Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

n8n contains a stored cross-site scripting vulnerability in the Chat Trigger node's Custom CSS field due to a misconfiguration of the sanitize-html library. Affected releases are those before 1.123.27, the 2.0.0 through 2.13.2 line, and 2.14.0 (fixed in 1.123.27, 2.13.3, and 2.14.1). An authenticated user with permission to create or modify workflows can inject JavaScript that bypasses sanitization, resulting in stored XSS against any user who visits the public chat page.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

n8n n8n

Default version status: unaffected

  • 0 to < 1.123.27affected
  • 1.123.27unaffected
  • 2.0.0-rc.0 to < 2.13.3affected
  • 2.13.3unaffected
  • 2.14.0 to < 2.14.1affected
  • 2.14.1unaffected
pkg:npm/n8n

n8n n8n

Default version status: unaffected

  • 2.14.0 to < 2.14.1affected
  • 2.14.1unaffected
pkg:npm/n8n

n8n n8n

Default version status: unaffected

  • 2.0.0-rc.0 to < 2.13.3affected
  • 2.13.3unaffected
pkg:npm/n8n

References