AI agent vulnerability · n8n

CVE-2025-58177: Stored XSS in n8n LangChain Chat Trigger Node via initialMessages Parameter

mediumCVSS 3.1 4.1GHSA-mvh4-2cm2-6hpg

Impact A stored Cross-Site Scripting (XSS) vulnerability was identified in the @n8n/n8n-nodes-langchain.chatTrigger node in n8n. If an authorized user configures the node with malicious JavaScript in the initialMessages field and enables public access, the script will be executed in the browser of anyone who visits the resulting public chat URL.

Published Sep 15, 2025

Affected packages

n8n

Ecosystem: npm
Affected: >= 1.24.0, < 1.107.0
Fixed in: 1.107.0
Check: npm ls n8n

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

Impact

A stored Cross-Site Scripting (XSS) vulnerability was identified in the @n8n/n8n-nodes-langchain.chatTrigger node in n8n. If an authorized user configures the node with malicious JavaScript in the initialMessages field and enables public access, the script will be executed in the browser of anyone who visits the resulting public chat URL.

This vulnerability could be exploited for phishing or to steal cookies or other sensitive data from users who access the public chat link, posing a security risk.

Patches

This issue has been patched in version 1.107.0 of n8n. Users should upgrade to version 1.107.0 or later.

Workarounds

Disabling the n8n-nodes-langchain.chatTrigger node (docs)

References

#18148

Credited to pfelilpe, 5h0lm3s.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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