CVE-2026-126494

HIGH 7.1

OpenEMR before 8.4.0 Privilege Escalation via SMART/OAuth Scope Finalization

CVSS Score

7.1

EPSS Score

0.0%

EPSS Percentile

0th

OpenEMR before 8.4.0 contains an improper authorization vulnerability in ScopeRepository::finalizeScopes() that allows read-only SMART/OAuth clients to obtain write scopes because ScopeEntity::containsScope() ignores registered permissions. Attackers with a client registered for user/<resource>.read can request user/<resource>.write to create, update, and delete appointments or patient data.

CWE	CWE-863
Vendor	openemr
Product	openemr
Published	Nov 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

Low

Affected Versions

openemr / openemr

0 < 8.4.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/openemr/openemr/security/advisories/GHSA-6cmr-r2rh-755m vulncheck.com: https://www.vulncheck.com/advisories/openemr-before-8.4.0-privilege-escalation-via-smart-oauth-scope-finalization

Credits

🔍 christos-cantina-security kojiromike mcspicyenjoyer