Auth bypass in Open-Emr Openemr
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.
Vulnerability class: Broken Access Control
EPSS: 0.003 (23.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Open-emr Openemr
- Openemr — versions < 8.0.0.2
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-33302?
- CVE-2026-33302 is a high-severity vulnerability in Open-Emr Openemr, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-03-19.
- How severe is CVE-2026-33302?
- High severity. CVSS v3 base score is 8.1 out of 10.