{"id":"CVE-2026-40509","title":"OpenEMR before 8.3.0 contains a cross-site request forgery vulnerability in the DICOM viewer","summary":"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 attac…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","cwe":["CWE-352"],"published":"2026-08-19","updated":"2026-09-09","sourceUpdated":"2026-09-09T20:40:01.933","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-40509","references":[{"url":"https://github.com/openemr/openemr/commit/f760adc7bddaf9d118e1a0d40590e686783ed21b","label":"disclosure@vulncheck.com"},{"url":"https://github.com/openemr/openemr/releases/tag/v8_3_0","label":"disclosure@vulncheck.com"},{"url":"https://github.com/openemr/openemr/security/advisories/GHSA-wffp-pj5h-xqwp","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/openemr-csrf-via-dicom-viewer-web-path-parameter","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00128,"epssPercentile":0.0278,"ingestedAt":"2026-09-09T21:22:45.539Z","slug":"CVE-2026-40509","body":"## Overview\n\nOpenEMR 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}