Vulnerability · Published Sep 3, 2026 · Assigned by GitHub_M
CVE-2026-44506Medplum - Exposure of OAuth client secret via dynamic registration endpoint in self-hosted configurations
High 8.2
In plain English
A high-severity information exposure in medplum from medplum. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).
Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.4%top 71.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
References
- https://github.com/medplum/medplum/security/advisories/GHSA-ch8p-j6cm-r7w5 x_refsource_CONFIRM
- https://github.com/medplum/medplum/releases/tag/v5.1.7 x_refsource_MISC