Stored XSS in n8n LangChain Chat Trigger Node via initialMessages Parameter
Exact source revision recorded 24 Oct 2026 13:17:17 UTC. It does not establish the source's current position. Latest evidence.
osv · GHSA-mvh4-2cm2-6hpg
Published### 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](https://docs.n8n.io/hosting/securing/blocking-nodes/)) ### References #18148
- Source published
- 15 Sep 2025 17:14:27 UTC
- Source modified
- 15 Sep 2025 20:07:54 UTC
- Observed here
- 24 Oct 2026 13:17:17 UTC
- Source terms
- GitHub Advisory Database · CC-BY-4.0
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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.
CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
Publisher rating · MODERATE