CVE-2026-44506
High
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.
SeverityHigh
CVSS8.2
Exploit probability—
ProductMedplum
PublishedSep 3, 2026
First seenSep 3, 2026
Weakness typeCWE-200Sensitive information exposure
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| medplum medplum | >= 4.1.10, < 5.1.7 | — |
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