{"id":"CVE-2026-33302","aliases":["EUVD-2026-13221","GHSA-v68v-pwc4-8p2m"],"status":"published","title":"OpenEMR: zhAclCheck Ignores Explicit ACL Denies","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.","severity":{"version":"4.0","score":7.3,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00328,"percentile":0.26171,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-863"],"published":"2026-03-19T20:23:17Z","modified":"2026-10-28T02:31:08Z","products":[{"vendor":"open-emr","product":"openemr"},{"vendor":"openemr","product":"openemr"}],"references":[{"url":"https://github.com/openemr/openemr/security/advisories/GHSA-v68v-pwc4-8p2m","tags":["x_refsource_CONFIRM","Exploit","Vendor Advisory","advisory"]},{"url":"https://github.com/openemr/openemr/commit/0ef9b1763029e52d43fcb4fd0ebb0769a7ec43d4","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33302.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33302","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-33302","title":"OpenEMR: zhAclCheck Ignores Explicit ACL Denies","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.","status":"published","published":"2026-03-19T20:23:17.172Z","modified":"2026-03-20T20:20:42.266Z","cvss":[{"version":"4.0","score":7.3,"vector":"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","level":"high","assessor":"cna"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:20:08.009733Z"}],"euvd":[{"id":"EUVD-2026-13221","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.","status":"published","published":"2026-03-19T20:23:17Z","modified":"2026-03-20T20:20:42Z","cvss":[{"version":"4.0","score":7.3,"vector":"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","level":"high"}],"updated_at":"2026-11-02T19:25:32.04432Z"}],"nvd":[{"id":"CVE-2026-33302","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.","status":"published","published":"2026-03-19T21:17:11.38Z","modified":"2026-06-17T10:37:17.047Z","cvss":[{"version":"4.0","score":7.3,"vector":"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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:12:09.735529Z"}],"osv":[{"id":"CVE-2026-33302","title":"OpenEMR: zhAclCheck Ignores Explicit ACL Denies","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.","status":"published","published":"2026-03-19T20:23:17.172Z","modified":"2026-10-28T02:31:08.967179811Z","cvss":[{"version":"4.0","score":7.3,"vector":"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","level":"high"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T15:45:01.896044Z"}]}}