High severity · published Oct 14, 2026
CVE-2026-110847
n8n before 1.123.83, 2.41.4, and 2.42.1 Stored XSS via Chat Trigger customCss Parameter
7.0
CVSS
0.4%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N8
n8n · n8n-io
before 1.123.83; 2.0.0 before 2.41.4; 2.42.0 before 2.42.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-110847
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-110847
github.com
https://github.com/n8n-io/n8n/security/advisories/GHSA-x5cw-hm7v-q7mj
www.vulncheck.com
https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-stored-xss-via-chat-trigger-customcss-parameter
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