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.
Use CWE-639, Open-Emr vendor hub and Openemr product page to widen CVE-2026-27943 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2026-33917, CVE-2026-34055 and CVE-2026-34056 for nearby disclosures in the same product family.