| Component | n8n |
| Severity | medium (CVSS 5.4) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| Published (NVD) | 2026-06-23 |
| Last modified | 2026-06-26 |
| Affected versions | n8n < 1.123.55 n8n >= 2.0.0, < 2.25.7 n8n >= 2.26.0, < 2.26.2 |
| Fixed in | 1.123.55, 2.25.7, 2.26.2 |
| Weakness | CWE-79 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade n8n to
1.123.55or later (or the patched release of your branch: 2.25.7, 2.26.2). - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
Read more
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