CVE-2026-86075
n8n: Unauthenticated Persistent Storage Exhaustion via OAuth Dynamic Client Registration Endpoint
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-770 |
| Vendor | n8n-io |
| Product | n8n |
| Published | Sep 8, 2026 |
| Last Updated | Sep 9, 2026 |
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Affected Versions
n8n-io / n8n
< 2.37.7 >= 2.38.0, < 2.38.2