{"id":"CVE-2026-124484","aliases":["GHSA-4r76-rq83-hgpg"],"url":"https://o3.security/vulnerability/CVE-2026-124484","summary":"OpenEMR before 8.4.0 Missing Authorization in Portal Onsite-Document APIs","details":"OpenEMR before 8.4.0 contains a missing authorization vulnerability in portal onsite-document APIs that allows any authenticated core user to access cross-patient documents. Attackers can omit the patientId parameter and supply arbitrary record IDs to list, read, and overwrite other patients' portal documents, signatures, and template data.","published":"2026-11-08T13:16:02.837Z","modified":"2026-11-09T02:47:18.370633483Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/124xxx/CVE-2026-124484.json"},{"type":"ADVISORY","url":"https://github.com/openemr/openemr/security/advisories/GHSA-4r76-rq83-hgpg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124484"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openemr-before-8.4.0-missing-authorization-in-portal-onsite-document-apis"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-11-09T02:47:18.370633483Z"}}