---
id: CVE-2026-67610
title: >-
  OpenEMR through 8.2.0 contains an improper authentication vulnerability in the
  OAuth2 dynamic client registration endpoint that allows unauthenticated
  attackers to register a malicious client with system-level FHIR scopes by
  supplying a …
summary: >-
  OpenEMR through 8.2.0 contains an improper authentication vulnerability in the
  OAuth2 dynamic client registration endpoint that allows unauthenticated
  attackers to register a malicious client with system-level FHIR scopes by
  supplying a …
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-306
published: '2026-08-03'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:40:01.933'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67610'
references:
  - url: >-
      https://jivasecurity.com/writeups/openemr-unauth-oauth2-client-registration
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/openemr-oauth2-dynamic-client-registration-unauthorized-fhir-access
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00481
epssPercentile: 0.3888
ingestedAt: '2026-09-09T21:22:45.522Z'
---

## Overview

OpenEMR through 8.2.0 contains an improper authentication vulnerability in the OAuth2 dynamic client registration endpoint that allows unauthenticated attackers to register a malicious client with system-level FHIR scopes by supplying a self-generated RSA keypair via the jwks field. Once an administrator approves the registered client, attackers can use the client_credentials grant with a self-signed JWT assertion to obtain access tokens granting read access to all FHIR resources across all patients in the system.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.