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CVE-2026-86073

CVE-2026-86073 · n8n: Per-Resource OAuth Consent Bypass via Unbound Refresh Token Resource Substitution

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 2.38.1, the OAuth token endpoint bound an authorization code's first access token to the consented resource but did not bind its refresh token. Refreshing checked only that the requested resource was registered, not that it matched the original grant. An OAuth client approved for one workflow could substitute a different workflow URL in the resource parameter and obtain a valid token for an unapproved workflow accessible to the consenting user. This issue is fixed in versions 2.37.7 and 2.38.1.

CVSS 5.9 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • n8n

    Versions
    • < 2.37.7: Affected
    • >= 2.38.0, < 2.38.1: Affected

    No fix published

  • n8n npm

    Affected ranges
    • SEMVER: ≥ 2.38.0, < 2.38.1

    Update to 2.38.1

  • n8n npm

    Affected ranges
    • SEMVER: < 2.37.7

    Update to 2.37.7

Original sources

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