CVE-2026-40509

MEDIUM 4.3

OpenEMR < 8.3.0 CSRF via DICOM Viewer web_path Parameter

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-352
Vendor	openemr
Product	openemr
Published	Aug 19, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

openemr / openemr

0 < 8.3.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Alex Williams from Pellera Technologies VulnCheck