CVE-2026-25054: n8n is Vulnerable to Stored Cross-Site Scripting via Markdown Rendering in Workflow UI
Impact A Cross-site Scripting (XSS) vulnerability existed in a markdown rendering component used in n8n's interface, including workflow sticky notes and other areas that support markdown content.
An authenticated user with permission to create or modify workflows could abuse this to execute scripts with same-origin privileges when other users interact with a maliciously crafted workflow. This could lead to session hijacking and account takeover.
Patches The issue has been fixed in n8n versions 2.2.1 and 1.123.9. Users should upgrade to these versions or later to remediate the vulnerability.
Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Limit workflow creation and editing permissions to fully trusted users only. - Review existing workflows for potentially malicious markdown content in sticky notes and other components. - Educate users about the risks of opening workflows from untrusted sources. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
--- n8n has adopted CVSS 4.0 as primary score for all security advisories. CVSS 3.1 vector strings are provided for backward compatibility.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Other sources
n8n is an open source workflow automation platform. Prior to versions 1.123.9 and 2.2.1, a Cross-Site Scripting (XSS) vulnerability existed in a markdown rendering component used in n8n's interface, including workflow sticky notes and other areas that support markdown content. An authenticated user with permission to create or modify workflows could abuse this to execute scripts with same-origin privileges when other users interact with a maliciously crafted workflow. This could lead to session hijacking and account takeover. This issue has been patched in versions 1.123.9 and 2.2.1.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-25054?
CVE-2026-25054 is rated with a moderate severity due to its potential for exploiting Cross-Site Scripting vulnerabilities in n8n.
How do I fix CVE-2026-25054?
To remediate CVE-2026-25054, upgrade to n8n version 1.123.9 or 2.2.1 or later.
What types of n8n components are affected by CVE-2026-25054?
CVE-2026-25054 affects markdown rendering components in the n8n interface, including workflow sticky notes.
Is authentication required to exploit CVE-2026-25054?
Yes, an attacker must be authenticated to exploit the Cross-Site Scripting vulnerability in CVE-2026-25054.
Which versions of n8n are vulnerable to CVE-2026-25054?
n8n versions prior to 1.123.9 and versions between 2.0.0 and 2.2.1 are vulnerable to CVE-2026-25054.