CVE-2026-27943 OpenEMR's Eye Exam View Trusts form_id Without Verifying Patient/Encounter Ownership

Medium 6.5 Published 26 Feb 2026 Updated 26 Feb 2026

Authenticated users can access or modify any patient's eye exam records by manipulating form IDs due to missing ownership verification.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-27943?

CVE-2026-27943 is a medium-severity missing authorization vulnerability in Open-Emr Openemr, published on 26 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

OpenEMR is a free and open source electronic health records and medical practice management application. In versions up to and including 8.0.0, the eye exam (eye_mag) view loads data by `form_id` (or equivalent) without verifying that the form belongs to the current user’s patient/encounter context. An authenticated user can access or edit any patient’s eye exam by supplying another form ID; in some flows the session’s active patient may also be switched. A fix is available on the `main` branch of the OpenEMR GitHub repository.

Weakness: CWE-639

Which versions are affected by CVE-2026-27943?

It affects 1 product.

Products include Open-Emr Openemr.

How do I fix CVE-2026-27943?

No fix has been published for CVE-2026-27943 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-27943 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27943 exists.

All Open-Emr Openemr vulnerabilities

Sources

Also known as GHSA-q96x-qw99-6xq9.