{"id":"CVE-2026-44506","aliases":["GHSA-ch8p-j6cm-r7w5"],"url":"https://o3.security/vulnerability/CVE-2026-44506","summary":"Medplum - Exposure of OAuth client secret via dynamic registration endpoint in self-hosted configurations","details":"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.","published":"2026-09-03T19:04:47.285Z","modified":"2026-09-05T03:47:54.264115631Z","cvss":{"score":8.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://github.com/medplum/medplum/releases/tag/v5.1.7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44506.json"},{"type":"ADVISORY","url":"https://github.com/medplum/medplum/security/advisories/GHSA-ch8p-j6cm-r7w5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44506"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-05T03:47:54.264115631Z"}}