CVE-2026-27943 MEDIUM

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

Vendor Openemr
Product openemr
Weakness CWE-639 · IDOR
Published February 26, 2026
Last update February 26, 2026

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 26, 2026 CVE published
February 26, 2026 Record updated