CVE-2026-40509

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.

CVSS 4.0

5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

4.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-26)

CWE

CWE-352

Published

2026-08-19

Modified

2026-10-27

Record from

the NVD, synced 2026-10-27

References

• https://github.com/openemr/openemr/commit/f760adc7bddaf9d118e1a0d40590e686783ed21b
• https://github.com/openemr/openemr/releases/tag/v8_3_0
• https://github.com/openemr/openemr/security/advisories/GHSA-wffp-pj5h-xqwp
• https://www.vulncheck.com/advisories/openemr-csrf-via-dicom-viewer-web-path-parameter

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