CVE-2026-33302

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/openemr/openemr/commit/0ef9b1763029e52d43fcb4fd0ebb0769a7ec43d4	Patch
https://github.com/openemr/openemr/security/advisories/GHSA-v68v-pwc4-8p2m	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-19 21:17

Updated : 2026-03-20 15:53

NVD link : CVE-2026-33302

Mitre link : CVE-2026-33302

CVE.ORG link : CVE-2026-33302

JSON object : View

Products Affected

open-emr

openemr

CWE

CWE-863

Incorrect Authorization

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