| Component | n8n |
| Severity | high (CVSS 7.5) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Published (NVD) | 2026-09-08 |
| Last modified | 2026-09-11 |
| Affected versions | n8n < 2.37.7 n8n >= 2.38.0, < 2.38.2 |
| Fixed in | 2.37.7, 2.38.2 |
| Weakness | CWE-770 |
| CISA KEV | not listed |
NVD description
n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the OAuth Dynamic Client Registration endpoint bounded redirect_uris but accepted arbitrarily large client_name and grant_types values. An unauthenticated remote caller could repeatedly persist oversized values in oauth_clients and exhaust database storage. The affected validation is in packages/cli/src/modules/oauth-server/oauth-server.service.ts, including MAX_CLIENT_NAME_LENGTH and MAX_GRANT_TYPES. This issue is fixed in versions 2.37.7 and 2.38.2.
What to do
- Upgrade n8n to
2.37.7or later (or the patched release of your branch: 2.38.2). - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-86075
- https://github.com/n8n-io/n8n/security/advisories/GHSA-hh89-3r9w-qj3j
- https://github.com/n8n-io/n8n/releases/tag/[email protected]
- https://github.com/n8n-io/n8n/releases/tag/[email protected]
Read more
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