CVE-2026-40509 OpenEMR < 8.3.0 CSRF via DICOM Viewer web_path Parameter
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-40509?
CVE-2026-40509 is a medium-severity vulnerability in openemr, published on 19 Aug 2026.
Official description
OpenEMR before 8.3.0 contains a cross-site request forgery vulnerability in the DICOM viewer. The web_path GET parameter in the DICOM viewer page is embedded unsanitized as a URL without validation against expected path formats. An attacker can craft a URL that causes an authenticated user with Patients - Documents permissions to make authenticated requests to arbitrary OpenEMR endpoints, enabling forced logout and other state-changing actions.
Weakness: CWE-352
Which versions are affected by CVE-2026-40509?
How do I fix CVE-2026-40509?
No fix has been published for CVE-2026-40509 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-40509 being exploited?
There is no known exploitation of CVE-2026-40509 in the wild and no public exploit code.
Sources
Also known as GHSA-c2ph-gr8x-j747, GHSA-wffp-pj5h-xqwp.