{"affected":[{"defaultStatus":"unaffected","product":"openemr","source":"CNA: VulnCheck","vendor":"openemr","versions":[{"lessThan":"8.4.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"8.4.0","versionType":"semver"}]}],"cveId":"CVE-2026-124482","cwes":["CWE-639"],"description":"OpenEMR before 8.4.0 contains an authorization bypass allowing low-privileged SMART standalone-launch users to bind arbitrary patient UUIDs into the OAuth token context. Attackers with only the patients|demo ACL can select a victim during authorization and read that patient's clinical notes and documents through patient-scoped DocumentReference and Binary FHIR endpoints.","epss":{"date":"2026-11-10","percentile":0.1281,"score":0.00221},"exploits":[],"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":1794333257439,"publishedAt":1794143761436,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-rm4j-gxwp-qh48"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/openemr-before-8.4.0-cross-patient-phi-exfiltration-via-smart-patient-launch"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-rm4j-gxwp-qh48"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/openemr-before-8.4.0-cross-patient-phi-exfiltration-via-smart-patient-launch"}],"remediation":[],"revision":"8d041092207f894d339b77e4f58607c94c3bde954b41a806200dacf5d9b97682","sources":[{"modifiedAt":1794333257439,"name":"CNA: VulnCheck","retrievedAt":1794334265462,"url":"https://www.cve.org/CVERecord?id=CVE-2026-124482"},{"modifiedAt":1794147497457,"name":"NVD","retrievedAt":1794161779335,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124482"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794334278851,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-124482"}],"ssvc":{"assessedAt":1794325353190,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"OpenEMR before 8.4.0 Cross-Patient PHI Exfiltration via SMART Patient Launch","updatedAt":1794334278851}