CVE-2026-25051 HIGH

CVE-2026-25051: n8n Improper CSP Enforcement in Webhook Responses May Allow Stored XSS

Vendor N8N-Io
Product n8n
Weakness CWE-79 · XSS
Published February 4, 2026
Last update February 5, 2026

CVSS base score

8.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N

What the vulnerability does

01Description

n8n is an open source workflow automation platform. Prior to version 1.123.2, a Cross-Site Scripting (XSS) vulnerability has been identified in the handling of webhook responses and related HTTP endpoints. Under certain conditions, the Content Security Policy (CSP) sandbox protection intended to isolate HTML responses may not be applied correctly. An authenticated user with permission to create or modify workflows could abuse this to execute malicious scripts with same-origin privileges when other users interact with the crafted workflow. This could lead to session hijacking and account takeover. This issue has been patched in version 1.123.2.

Key dates

02Disclosure timeline

February 4, 2026 CVE published
February 5, 2026 Record updated