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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (28.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Open-Emr Openemr
- Openemr — versions < 8.0.0.2
Weakness classification (CWE)
References
- github.com/openemr/openemr/security/advisories/GHSA-v68v-pwc4-8p2m (Exploit, Vendor Advisory)
- github.com/openemr/openemr/commit/0ef9b1763029e52d43fcb4fd0ebb0769a7ec43d4 (Patch)
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.