CVE-2026-124482

EUVD-2026-119537
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://github.com/openemr/openemr/security/advisories/GHSA-rm4j-gxwp-qh48
https://www.vulncheck.com/advisories/openemr-before-8.4.0-cross-patient-phi-exfiltration-via-smart-patient-launch