Medium 4.3HealthcarePublished Aug 19, 2026

CVE-2026-40509OpenEMR < 8.3.0 CSRF via DICOM Viewer web_path Parameter

Updated under an hour ago (2026-10-19 07:20 UTC)

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It affects openemr. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.19%, higher than 8% of scored CVEs.

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Exploited in the last 30 days

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: 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-352
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.19% (percentile 8)
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

openemr openemr openemr:openemr (from the name)	before 8.3.0	CNA record

References

https://github.com/openemr/openemr/security/advisories/GHSA-wffp-pj5h-xqwpvendor-advisory
https://github.com/openemr/openemr/releases/tag/v8_3_0release-notes
https://github.com/openemr/openemr/commit/f760adc7bddaf9d118e1a0d40590e686783ed21bpatch
https://www.vulncheck.com/advisories/openemr-csrf-via-dicom-viewer-web-path-parameterthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.