All vulnerabilities
CVE-2026-110847GHSA-x5cw-hm7v-q7mj

n8n before 1.123.83, 2.41.4, and 2.42.1 Stored XSS via Chat Trigger customCss Parameter

n8n-io n8nFrameworks
Open in ThreatlineRecord JSON
CVSS
7.0High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.37%Chance of exploitation activity in the next 30 days, higher than 29% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1.123.83Also 2.41.4, 2.42.1CVE List
Published14 Oct 2026Updated 15 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 3

  • n8naffected: all versions before 1.123.83CVE List
  • n8naffected: 2.0.0 before 2.41.4CVE List
  • n8naffected: 2.42.0 before 2.42.1CVE List

References 2