p PatchFirst

CVE-2026-86075

CVE-2026-86075 · n8n: Unauthenticated Persistent Storage Exhaustion via OAuth Dynamic Client Registration Endpoint

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 8.7 · High · EPSS 0.6% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • n8n

    Versions
    • < 2.37.7: Affected
    • >= 2.38.0, < 2.38.2: Affected

    No fix published

  • n8n npm

    Affected ranges
    • SEMVER: ≥ 2.38.0, < 2.38.2

    Update to 2.38.2

  • n8n npm

    Affected ranges
    • SEMVER: < 2.37.7

    Update to 2.37.7

Original sources

Check your server →