Vulnerability details
CVE-2026-33302
openemr openemr
OpenEMR: zhAclCheck Ignores Explicit ACL Denies
CVSS 4.0
7.3High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.3High | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| openemr | openemr | < 8.0.0.2 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-03-19
- Last updated
- 2026-03-20
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.32%
Probability of exploitation in 30 days
25.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-863Incorrect Authorization