{"id":"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.","aliases":["GHSA-ch8p-j6cm-r7w5"],"modified":"2026-09-06T03:30:52.601081548Z","published":"2026-09-03T19:04:47.285Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-200"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44506.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/medplum/medplum","events":[{"introduced":"abdf60cb2e07296c206a1e042174cbcdca7201ca"},{"fixed":"365bb971dbaa7b14fdb1e4489405d471d1984ade"}],"database_specific":{"extracted_events":[{"introduced":"4.1.10"},{"fixed":"5.1.7"}],"source":"AFFECTED_FIELD"}}],"versions":["v5.1.6","v5.1.5","v5.1.4","v5.1.3","v5.1.2","v5.1.1","v5.1.0","v5.0.15","v5.0.14","v5.0.13","v5.0.12","v5.0.11","v5.0.10","v5.0.9","v4.1.12","v5.0.8","v5.0.7","v5.0.6","v5.0.5","v5.0.4","v5.0.3","v5.0.2","v5.0.1","v5.0.0","v4.5.2","v4.5.1","v4.5.0","v4.4.3","v4.4.2","v4.4.1","v4.4.0","v4.3.15","v4.3.14","v4.3.13","v4.3.12","v4.3.11","v4.3.10","v4.3.9","v4.3.8","v4.3.7","v4.3.6","v4.3.5","v4.3.4","v4.3.3","v4.3.2","v4.3.1","v4.3.0","v4.2.6","v4.2.4","v4.2.3","v4.2.2","v4.2.1","v4.2.0","v4.1.11","v4.1.10"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44506.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N"}]}