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.

Score

CVSS 3.1 8.1 High

Status

Analyzed - security-advisories@github.com

Published

2026-03-19

Last modified

2026-03-20

Weaknesses

CWE-863

Affected products

• Openemr (Open-emr)
• Openemr (Openemr)

References

• https://github.com/openemr/openemr/commit/0ef9b1763029e52d43fcb4fd0ebb0769a7ec43d4
• https://github.com/openemr/openemr/security/advisories/GHSA-v68v-pwc4-8p2m