n8n: Reflected XSS via Facebook, WhatsApp, and Microsoft Teams Trigger Webhook Verification Endpoints
- Product
- n8n
- CVE
- CVE-2026-54303
- Affected
- n8n < 2.24.0
- Fixed in
- 2.24.0
Last verified against sources: October 26, 2026
Am I affected?
n8n: affected n8n < 2.24.0. Fixed in 2.24.0.
- Check your version: run
npm ls n8n. Versions < 2.24.0 of n8n are affected. [1]
What to do now
- Upgrade to the fixed version: run
npm install n8n@2.24.0(first patched version 2.24.0). [1] - Upgrade to n8n version 2.24.0 or later. [1]
- Limit workflow creation and activation permissions to fully trusted users only. [1]
- Disable the affected nodes by adding
n8n-nodes-base.facebookTrigger,n8n-nodes-base.whatsAppTrigger,n8n-nodes-base.facebookLeadAdsTrigger, andn8n-nodes-base.microsoftTeamsTriggerto theNODES_EXCLUDEenvironment variable. [1]
General practice, not from the source: if the affected software could read tokens or credentials, rotate them after upgrading; pin versions and review changes before updating tools your agents run.
What happened
Impact
- This enables reflected XSS in the n8n origin when a logged-in user visits a crafted URL. [1]
What was done
Sources
- GHSA-h86q-fx34-gfjr — GitHub Advisory Database
Every statement above was checked against these sources before publishing. Spotted an error? Tell us and we will correct it with a dated note.
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Copy a plain-text summary for Slack, GitHub issues, or team security channels.
[CVE-2026-54303] n8n: Reflected XSS via Facebook, WhatsApp, and Microsoft Teams Trigger Webhook Verification Endpoints
Product: n8n | Affected: n8n < 2.24.0 | Fixed in: 2.24.0
Summary: An endpoint in the Meta and Microsoft Teams trigger nodes reflects a query parameter into the HTTP response without sanitization or Content-Security-Policy headers.
Source & remediation on AgentArmorHQ: https://agentarmorhq.com/incidents/2026/06/cve-2026-54303-n8nCorrections
Report an error or request a correction. We review requests within 5 business days and add a dated correction note.
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