CVE-2026-44506

HIGHPre-NVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (26th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
52
EG Risk 52/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity82% × 45%
Exploitation0% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
26th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 3, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Sep 3, 2026
Patch available. Sources: github_release, github.
github_release Patch Available

Version 5.1.7

Patch available: medplum/medplum v5.1.7

https://github.com/medplum/medplum/releases/tag/v5.1.7
github Patch Available

Medplum - Exposure of OAuth client secret via dynamic registration endpoint in self-hosted configurations · Advisory · medplum/medplum · GitHub

https://github.com/medplum/medplum/security/advisories/GHSA-ch8p-j6cm-r7w5

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 50× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-03 19:16 UTCEG score recompute
  2. 2026-10-03 14:25 UTCEPSS rescore
  3. 2026-10-02 19:26 UTCEG score recompute
  4. 2026-10-02 07:31 UTCEG score recompute
  5. 2026-10-01 19:50 UTCEPSS rescore
  6. 2026-09-30 19:07 UTCEG score recompute
  7. 2026-09-30 15:03 UTCEPSS rescore
  8. 2026-09-29 15:36 UTCEG score recompute
  9. 2026-09-29 03:42 UTCEG score recompute
  10. 2026-09-28 15:47 UTCEG score recompute
  11. 2026-09-27 15:57 UTCEG score recompute
  12. 2026-09-27 13:48 UTCEPSS rescore
  13. 2026-09-27 04:03 UTCEG score recompute
  14. 2026-09-26 15:58 UTCEPSS rescore
  15. 2026-09-26 03:41 UTCEG score recompute
  16. 2026-09-24 21:58 UTCEG score recompute
  17. 2026-09-23 21:14 UTCEG score recompute
  18. 2026-09-23 17:53 UTCEPSS rescore
  19. 2026-09-22 21:25 UTCEG score recompute
  20. 2026-09-21 21:30 UTCEG score recompute
  21. 2026-09-20 21:41 UTCEG score recompute
  22. 2026-09-20 20:15 UTCEPSS rescore
  23. 2026-09-19 21:50 UTCEG score recompute
  24. 2026-09-18 21:23 UTCEG score recompute
  25. 2026-09-18 19:28 UTCEPSS rescore
Show 28 more
  1. 2026-09-17 21:09 UTCEG score recompute
  2. 2026-09-17 19:31 UTCEPSS rescore
  3. 2026-09-16 21:20 UTCEG score recompute
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 09:03 UTCEG score recompute
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-15 08:14 UTCEG score recompute
  8. 2026-09-13 20:30 UTCEG score recompute
  9. 2026-09-13 16:47 UTCEPSS rescore
  10. 2026-09-12 20:40 UTCEG score recompute
  11. 2026-09-12 15:01 UTCEPSS rescore
  12. 2026-09-11 20:50 UTCEG score recompute
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 09:37 UTCEPSS rescore
  15. 2026-09-10 21:00 UTCEG score recompute
  16. 2026-09-10 09:34 UTCEPSS rescore
  17. 2026-09-08 23:06 UTCEG score recompute
  18. 2026-09-08 22:00 UTCEPSS rescore
  19. 2026-09-08 02:44 UTCEG score recompute
  20. 2026-09-07 16:01 UTCEPSS rescore
  21. 2026-09-06 14:02 UTCEG score recompute
  22. 2026-09-06 13:47 UTCEPSS rescore
  23. 2026-09-06 02:07 UTCEG score recompute
  24. 2026-09-04 14:21 UTCEG score recompute
  25. 2026-09-04 13:46 UTCEG score recompute
  26. 2026-09-03 20:23 UTCEG score recompute
  27. 2026-09-03 19:22 UTCEG score recompute
  28. 2026-09-03 19:18 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-44506?
CVE-2026-44506 is a high vulnerability published on September 3, 2026. 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 clientsecret of preconfigured OAuth clients defined via the defaultOAuthClients server configuration when a matching redirecturi was…
When was CVE-2026-44506 disclosed?
CVE-2026-44506 was first published on September 3, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44506 actively exploited?
CVE-2026-44506 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44506?
CVE-2026-44506 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-44506?
A fix for CVE-2026-44506 is available: update to the fixed version the vendor names in its advisory.

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