CVE-2026-67610 OpenEMR 8.2.0 OAuth2 Dynamic Client Registration Unauthorized FHIR Access
Unauthenticated attackers can register malicious OAuth2 clients to gain unauthorized read access to all patient FHIR data in OpenEMR.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-67610?
CVE-2026-67610 is a high-severity authentication bypass vulnerability in openemr, published on 3 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-306
Which versions are affected by CVE-2026-67610?
How do I fix CVE-2026-67610?
No fix has been published for CVE-2026-67610 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-67610 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67610 exists.
Sources
Also known as GHSA-7h45-2j8g-37rm.