CVE-2026-124484
HIGH
NVD
CVSS Score
8.8
Severity
HIGH
Published
Nov 08, 2026
Vendor
unknown
Description
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.