CVE-2026-44506CWE-200information-disclosure

CVE-2026-44506

High · published September 4, 2026

CVSS v3.1
8.2
EPSS
0%
Percentile
27.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00352 · 27.6th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-09-04T00:17Z
References (2)
https://github.com/medplum/medplum/releases/tag/v5.1.7 · [email protected]https://github.com/medplum/medplum/security/advisories/GHSA-ch8p-j6cm-r7w5 · [email protected]
EPSS history
Timeline
  • 05 SEP 03:42Z
    EPSS moved — → 0%
    epss
  • 03 SEP 19:04Z
    Medplum - Exposure of OAuth client secret via dynamic registration endpoint in self-hosted configurations
    cvelistv5