CVE-2026-33302
OpenEMR: zhAclCheck Ignores Explicit ACL Denies
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
11th
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.
| CWE | CWE-863 |
| Vendor | openemr |
| Product | openemr |
| Published | Mar 19, 2026 |
| Last Updated | Mar 20, 2026 |
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Affected Versions
openemr / openemr
< 8.0.0.2