CVE-2026-25051CWE-79

n8n Improper CSP Enforcement in Webhook Responses May Allow Stored XSS

High · published February 4, 2026

CVSS v4.0
8.5
EPSS
0%
Percentile
16.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.5 · HIGH
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
EPSS
0.00259 · 16.7th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-04T16:46Z
EPSS history
Timeline
  • 04 FEB 16:46Z
    n8n Improper CSP Enforcement in Webhook Responses May Allow Stored XSS
    cvelistv5