{"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-2026-124455","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 read other patients' documents by overriding Pid_Equals criteria. Attackers can supply Pid_Equals, Pid_GreaterThan, or Pid_In request parameters to the onsitedocuments API to retrieve signed consent forms, signatures, and PHI of any patient.","epss":{"date":"2026-11-12","percentile":0.17576,"score":0.00258},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/openemr/openemr/security/advisories/GHSA-hvp7-q2hp-6j6g"}],"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":1794512224457,"publishedAt":1794143744448,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-hvp7-q2hp-6j6g"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/openemr-before-8.3.0-idor-via-portal-onsitedocument-pid-equals-mass-assignment"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-hvp7-q2hp-6j6g"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-hvp7-q2hp-6j6g"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/openemr-before-8.3.0-idor-via-portal-onsitedocument-pid-equals-mass-assignment"}],"remediation":[],"revision":"d40a03bbc06e58a8df29810f85b9f93d9af4c0684314b6326474b1938b238044","sources":[{"modifiedAt":1794512224457,"name":"CNA: VulnCheck","retrievedAt":1794514182419,"url":"https://www.cve.org/CVERecord?id=CVE-2026-124455"},{"modifiedAt":1794347184960,"name":"NVD","retrievedAt":1794356361818,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124455"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794514203609,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-124455"}],"ssvc":{"assessedAt":1794512076778,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"OpenEMR before 8.3.0 IDOR via Portal OnsiteDocument Pid_Equals Mass-Assignment","updatedAt":1794514203609}