CVE-2026-124451 OpenEMR before 8.4.0 Authorization Bypass via checkUserHasAccessToPatient in SMART on FHIR
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-124451?
CVE-2026-124451 is a medium-severity vulnerability in openemr, published on 8 Nov 2026.
Official description
OpenEMR before 8.4.0 contains an authorization bypass vulnerability in its SMART on FHIR implementation because checkUserHasAccessToPatient() in BearerTokenAuthorizationStrategy.php unconditionally returns true. Authenticated users or malicious SMART apps can manipulate token launch context to bind requests to arbitrary patient UUIDs, gaining unauthorized read/write access to other patients' FHIR resources.
Weakness: CWE-639
Which versions are affected by CVE-2026-124451?
How do I fix CVE-2026-124451?
No fix has been published for CVE-2026-124451 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-124451 being exploited?
There is no known exploitation of CVE-2026-124451 in the wild and no public exploit code.
Sources
Also known as GHSA-85p4-grr3-gp5m, GHSA-xjgw-qjm5-4mq6.