n8n is an open source workflow automation platform. Prior to 1.123.55, 2.25.7, and 2.26.2, an authenticated user with workflow edit access could inject arbitrary JavaScript into the Chat Trigger's generated page by setting a malicious webhookId. When a logged-in user visited the chat URL, the injected code executed in the n8n origin with that user's session privileges. This vulnerability is fixed in 1.123.55, 2.25.7, and 2.26.2.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://github.com/n8n-io/n8n/security/advisories/GHSA-42h7-m79w-wvg5 Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.0 · n8nNVD modified 2026-10-26 11:10
Affected (CPE criteria) 1
cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*
References 1
- https://github.com/n8n-io/n8n/security/advisories/GHSA-42h7-m79w-wvg5 Mitigation, Vendor Advisory