Auth bypass in Openemr
CVE-2026-124482
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-rm4j-gxwp-qh48) (vendor-advisory)
- VulnCheck Advisory: OpenEMR before 8.4.0 Cross-Patient PHI Exfiltration via SMART Patient Launch (third-party-advisory)
Frequently asked questions
- What is CVE-2026-124482?
- CVE-2026-124482 is a medium-severity vulnerability in Openemr, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-11-08.
- How severe is CVE-2026-124482?
- Medium severity. CVSS v3 base score is 6.5 out of 10.