CVE-2026-110847CWE-79cross-site-scripting

CVE-2026-110847

published October 15, 2026

CVSS
7.0
EPSS
0%
Percentile
29.3
In the wild
Unconfirmed
What it is

n8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a stored cross-site scripting vulnerability in the Chat Trigger hosted-chat page, where insufficiently sanitised customCss values are interpolated into the page as markup. Workflow authors can publish a chat without n8n user authentication whose payload executes on the instance origin, acting on the sessions of signed-in visitors.

The record
Technical detail
CVSS
7.0 · NONE
CVSS v4.0
7.0 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00367 · 29.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-15T03:17Z
References (2)
https://github.com/n8n-io/n8n/security/advisories/GHSA-x5cw-hm7v-q7mj · [email protected]https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-stored-xss-via-chat-trigger-customcss-parameter · [email protected]
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 14 OCT 22:52Z
    n8n before 1.123.83, 2.41.4, and 2.42.1 Stored XSS via Chat Trigger customCss Parameter
    cvelistv5
  • 14 OCT 22:52Z
    n8n before 1.123.83, 2.41.4, and 2.42.1 Stored XSS via Chat Trigger customCss Parameter
    cvelistv5