n8n: Stored XSS in Chat Trigger Node_CVE-2026-54302

7 / 10

HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Description

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.

Basic Information

ID CVE-2026-54302

Source GitHub_M

Published Jun 23, 2026 at 15:46

Modified Jun 23, 2026 at 17:34

Affected Product

Vendor n8n-io

Product n8n

Version < 1.123.55

Affected Versions n8n-io n8n < 1.123.55
n8n-io n8n >= 2.0.0-rc.0, < 2.25.7
n8n-io n8n >= 2.26.0, < 2.26.2

CWE Classification

CWE-79

References

github.com /n8n-io/n8n/security/advisories/GHSA-42h7-m79w-wvg5

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