CVE-2026-33302: Open-EMR Openemr

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.0.0.2, the module ACL function `AclMain::zhAclCheck()` only checks for the presence of any "allow" (user or group). It never checks for explicit "deny" (allowed=0). As a result, administrators cannot revoke access by setting a user or group to "deny"; if the user is in a group that has "allow," access is granted regardless of explicit denies. Version 8.0.0.2 fixes the issue.

Affected products

• Open-EMR Openemr: before 8.0.0.2 (fixed in 8.0.0.2)

Published 2026-03-19. Last modified 2026-06-17.