CVE-2026-33302
High
Description
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.
SeverityHigh
CVSS8.1
Exploit probability—
ProductOpen-emr Openemr
PublishedMar 19, 2026
First seenMar 19, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- open-emr openemr8.0.0.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| open-emr openemr | v < 8.0.0.2 | 8.0.0.2 |
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