Auth bypass in Open-Emr Openemr
CVE-2026-27943
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Open-Emr Openemr
- Openemr — versions <= 8.0.0
Weakness classification (CWE)
References
- github.com/openemr/openemr/security/advisories/GHSA-q96x-qw99-6xq9 (Exploit, Vendor Advisory)
- github.com/openemr/openemr/commit/c87489bf63f2701b634d948279e104f2ed3df1c0 (Patch)
Frequently asked questions
- What is CVE-2026-27943?
- CVE-2026-27943 is a medium-severity vulnerability in Open-Emr Openemr, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-02-26.
- How severe is CVE-2026-27943?
- Medium severity. CVSS v3 base score is 6.5 out of 10.