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CVE-2026-44506— Medplum - Exposure of OAuth client secret via dynamic registration endpoint in self-hosted configurations

Quick assessment

Affected
medplum medplum
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Medplum 是一个用于开发医疗应用的开发者平台。在 Medplum 4.1.10 到 5.1.6 版本中，当提供了匹配的 时， 端点可能会返回通过服务器配置 预配置的 OAuth 客户端的 。该问题已在 5.1.7 版本中修复。

CVSS 8.2 · High

Possible ATT&CK Techniques 1 AI

T1213 · Data from Information Repositories

Affected Version Matrix 1

VendorProduct Version RangeStatus
medplum medplum >= 4.1.10, < 5.1.7 affected
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I. Basic Information for CVE-2026-44506

Vulnerability Information
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Vulnerability Title
Medplum - Exposure of OAuth client secret via dynamic registration endpoint in self-hosted configurations
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
medplum medplum >= 4.1.10, < 5.1.7 -

II. Public POCs for CVE-2026-44506

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III. Intelligence Information for CVE-2026-44506

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Vendor Advisories for CVE-2026-44506 (1)

Vendor Pages for CVE-2026-44506 (1)

IV. Related Vulnerabilities

Same product: medplum
Same vendor: medplum
Same weakness: CWE-200

V. Comments for CVE-2026-44506

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