| Component | n8n |
| Severity | medium (CVSS 6.5) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Published (NVD) | 2026-08-11 |
| Last modified | 2026-09-01 |
| Affected versions | n8n < 1.123.67 n8n >= 2.31.0, < 2.31.5 n8n = 2.32.0 |
| Fixed in | 1.123.67, 2.31.5 |
| Weakness | CWE-1321 |
| CISA KEV | not listed |
NVD description
n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the Edit Fields (Set) node. The node assigns output fields via a dot-notation path setter without restricting the field name, allowing an authenticated user to name a field after an inherited built-in method path and corrupt a shared global in the main Node.js process. Because that global is used on the request-authentication path, the instance then fails every authenticated request, causing an instance-wide denial of service for all users until the process is restarted.
What to do
- Upgrade n8n to
1.123.67or later (or the patched release of your branch: 2.31.5). - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-72749
- https://github.com/n8n-io/n8n/security/advisories/GHSA-xwx6-jjhv-84p8
- https://www.vulncheck.com/advisories/n8n-before-prototype-pollution-via-edit-fields
Read more
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