CVE-2026-33302OpenEMR: zhAclCheck Ignores Explicit ACL Denies
Updated under an hour ago ()
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It affects openemr and 1 other product. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.38%, higher than 30% of scored CVEs.
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Free account, 1 product
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
- 7.3 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.38% (percentile 30)
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Mar 20, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
openemr openemr openemr:openemr (from the name) | before 8.0.0.2 | CNA record |
open-emr openemr open-emr:openemr | before 8.0.0.2 | NVD |
References
- https://github.com/openemr/openemr/security/advisories/GHSA-v68v-pwc4-8p2mx-refsource-confirm, exploit, vendor-advisory
- https://github.com/openemr/openemr/commit/0ef9b1763029e52d43fcb4fd0ebb0769a7ec43d4x-refsource-misc, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.