{"id":"CVE-2026-102940","title":"OpenEMR: Missing Write ACL Allows Unauthorized Document Reassignment","summary":"OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.4.0, controllers/C_Document.class.php write actions, including move_action_process(), do not verify the caller's access t…","severity":"critical","cvss":9.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","cvssSource":"cna","cwe":["CWE-639"],"vendor":"openemr","product":"openemr","affected":["openemr < 8.4.0"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-11-05T21:02:14.936697Z"},"exploitAvailable":true,"published":"2026-11-05","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:02:33.527Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-102940","references":[{"url":"https://github.com/openemr/openemr/security/advisories/GHSA-92rh-g949-4mvv","label":"https://github.com/openemr/openemr/security/advisories/GHSA-92rh-g949-4mvv"},{"url":"https://github.com/openemr/openemr/pull/13353","label":"https://github.com/openemr/openemr/pull/13353"},{"url":"https://github.com/openemr/openemr/commit/312b5d042f7fa49cc78ebed041155fba339a991c","label":"https://github.com/openemr/openemr/commit/312b5d042f7fa49cc78ebed041155fba339a991c"},{"url":"https://github.com/openemr/openemr/releases/tag/v8_3_0","label":"https://github.com/openemr/openemr/releases/tag/v8_3_0"}],"tags":["cve.org","exploit-available"],"ingestedAt":"2026-11-05T22:38:31.955Z","slug":"CVE-2026-102940","body":"## Overview\n\nOpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.4.0, controllers/C_Document.class.php write actions, including move_action_process(), do not verify the caller's access to the source document, current patient and category, or destination patient and category before Document::change_patient() performs the mutation. A low-privilege authenticated user can reassign an arbitrary document to a patient or category the user can access and then retrieve it through the normally protected read path. The reassignment occurs before a later list rendering check, so a final HTTP 403 response does not mean the unauthorized write was blocked. This issue is fixed in version 8.4.0.\n\n## Affected\n\n- `openemr < 8.4.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":65,"depthScoreParts":{"impact":52.8,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}