{"id":"CVE-2026-33302","summary":"OpenEMR: zhAclCheck Ignores Explicit ACL Denies","details":"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.","aliases":["GHSA-v68v-pwc4-8p2m"],"modified":"2026-04-10T05:42:42.745564Z","published":"2026-03-19T20:23:17.172Z","database_specific":{"cwe_ids":["CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33302.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33302.json"},{"type":"ADVISORY","url":"https://github.com/openemr/openemr/security/advisories/GHSA-v68v-pwc4-8p2m"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33302"},{"type":"FIX","url":"https://github.com/openemr/openemr/commit/0ef9b1763029e52d43fcb4fd0ebb0769a7ec43d4"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openemr/openemr","events":[{"introduced":"0"},{"fixed":"d7ddb2dcb11332944c1e193ae0ac32eabe439f7c"}]}],"versions":["v2_7_2","v2_7_2-rc1","v2_7_2-rc2","v2_7_3-rc1","v2_8_0","v2_8_1","v2_8_2","v2_8_3","v2_9_0","v3_0_0","v3_0_1","v8_0_0","v8_0_0_1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33302.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}