{"affected":[{"defaultStatus":"unaffected","product":"openemr","source":"CNA: VulnCheck","vendor":"openemr","versions":[{"lessThan":"8.3.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"8.3.0","versionType":"semver"}]}],"cveId":"CVE-2026-124462","cwes":["CWE-639"],"description":"OpenEMR before 8.3.0 contains an insecure direct object reference vulnerability in OnsiteDocumentController::Query() that allows authenticated portal patients to bypass the lowercase pid authorization guard by supplying a capitalised Pid parameter. Attackers can request the api/onsitedocuments endpoint with Pid set to another patient's id to overwrite the session-pinned criteria and read other patients' onsite documents containing PHI.","epss":{"date":"2026-11-12","percentile":0.19952,"score":0.00273},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/openemr/openemr/security/advisories/GHSA-39jh-r9hg-rwg7"}],"kev":null,"metrics":[{"score":7.1,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":6.5,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},{"score":7.1,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":6.5,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}],"modifiedAt":1794540255150,"publishedAt":1794143749196,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-39jh-r9hg-rwg7"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/openemr-before-8.3.0-patient-portal-idor-via-case-sensitive-pid-parameter"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-39jh-r9hg-rwg7"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-39jh-r9hg-rwg7"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/openemr-before-8.3.0-patient-portal-idor-via-case-sensitive-pid-parameter"}],"remediation":[],"revision":"641bd8001f2593ad0f5385294682a7e3d4a8c6ae6a564ba1e67656ed4d6814b4","sources":[{"modifiedAt":1794540255150,"name":"CNA: VulnCheck","retrievedAt":1794542937595,"url":"https://www.cve.org/CVERecord?id=CVE-2026-124462"},{"modifiedAt":1794347189660,"name":"NVD","retrievedAt":1794356371336,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124462"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794542961957,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-124462"}],"ssvc":{"assessedAt":1794540233026,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"OpenEMR before 8.3.0 Patient Portal IDOR via Case-Sensitive Pid Parameter","updatedAt":1794542961957}