CVE-2026-56356 (GCVE-0-2026-56356)

Vulnerability from cvelistv5 – Published: 2026-06-30 22:08 – Updated: 2026-07-01 13:24
VLAI
Title
n8n - Stored Cross-Site Scripting in Chat Trigger Node Custom CSS Field
Summary
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.
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
n8n n8n Affected: 0 , < 1.123.27 (semver)
Unaffected: 1.123.27 (semver)
Affected: 2.0.0-rc.0 , < 2.13.3 (semver)
Unaffected: 2.13.3 (semver)
Affected: 2.14.0 , < 2.14.1 (semver)
Unaffected: 2.14.1 (semver)
Create a notification for this product.
n8n n8n Affected: 0 , < 2.14.1 (semver)
Unaffected: 2.14.1 (semver)
Create a notification for this product.
n8n n8n Affected: 0 , < 2.13.3 (semver)
Unaffected: 2.13.3 (semver)
Create a notification for this product.
Date Public
2026-03-25 00:00
Credits
JorianWoltjer
Show details on NVD website
To clipboard 

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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