CVE-2026-44506

Medplum - Exposure of OAuth client secret via dynamic registration endpoint in self-hosted configurations

Published Sep 3, 2026 CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed
Description
Medplum is a developer platform that enables development of healthcare apps. In Medplum versions 4.1.10 through 5.1.6, the /oauth2/register endpoint could return the client_secret of preconfigured OAuth clients defined via the defaultOAuthClients server configuration when a matching redirect_uri was provided. This issue has been patched in version 5.1.7.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Medplum
Medplum medplum
Vendors & Products Medplum
Medplum medplum
Type Values Removed Values Added
Description Medplum is a developer platform that enables development of healthcare apps. In Medplum versions 4.1.10 through 5.1.6, the /oauth2/register endpoint could return the client_secret of preconfigured OAuth clients defined via the defaultOAuthClients server configuration when a matching redirect_uri was provided. This issue has been patched in version 5.1.7.
Title Medplum - Exposure of OAuth client secret via dynamic registration endpoint in self-hosted configurations
Weaknesses CWE-200
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 4, 2026, 1:41 PM
Reserved
May 6, 2026, 6:28 PM
Status
Deferred
Published
Sep 3, 2026, 8:17 PM
Modified
Sep 9, 2026, 9:09 PM