CVE-2026-54302: n8n: Stored XSS in Chat Trigger Node

June 16, 2026 (updated July 20, 2026)

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.

References

github.com/advisories/GHSA-42h7-m79w-wvg5
github.com/n8n-io/n8n/security/advisories/GHSA-42h7-m79w-wvg5
nvd.nist.gov/vuln/detail/CVE-2026-54302

Code Behaviors & Features

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