{"affected":[{"product":"openemr","source":"CNA: GitHub_M","vendor":"openemr","versions":[{"status":"affected","version":">= 6.0.0, < 8.3.0"}]},{"ecosystem":"composer","packageName":"openemr/openemr","product":"openemr/openemr","source":"GitHub GHSA-rr38-hpxq-wwff","vendor":"","versions":[{"status":"affected","version":">=6.0.0 <=8.3.0","versionType":"GitHub advisory range"}]}],"cveId":"CVE-2026-103021","cwes":["CWE-200","CWE-203","CWE-208"],"description":"OpenEMR is a free and open source electronic health records and medical practice management application. From 6.0.0 until 8.3.0, interface/globals.php uses the unauthenticated authUser login parameter to populate temp_authuserid and load that account's user_settings before authentication succeeds. Existing usernames can therefore cause an additional database query and may apply visible customized settings, while nonexistent usernames skip that behavior. A remote unauthenticated actor can use timing or page differences to enumerate valid accounts for later credential attacks. This issue is fixed in version 8.3.0.","epss":{"date":"2026-11-09","percentile":0.28298,"score":0.00345},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/openemr/openemr/security/advisories/GHSA-rr38-hpxq-wwff"}],"kev":null,"metrics":[{"score":5.3,"severity":"medium","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},{"score":5.3,"severity":"medium","source":"NVD: security-advisories@github.com","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}],"modifiedAt":1794248298534,"publishedAt":1793909196954,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-rr38-hpxq-wwff"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/openemr/openemr/pull/13133"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/openemr/openemr/commit/50f789fad45ada625fe8d0faf0c7a9c15ef52aa5"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/openemr/openemr/releases/tag/v8_3_0"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-rr38-hpxq-wwff"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/openemr/openemr/commit/50f789fad45ada625fe8d0faf0c7a9c15ef52aa5"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/openemr/openemr/pull/13133"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/openemr/openemr/releases/tag/v8_3_0"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-rr38-hpxq-wwff"},{"source":"GitHub Security Advisories","tags":["advisory"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-rr38-hpxq-wwff"}],"remediation":[{"kind":"fix","source":"GitHub GHSA-rr38-hpxq-wwff","text":"openemr/openemr (composer): GitHub reports patched versions 8.3.0. Check the advisory for the affected release branch.","url":"https://github.com/openemr/openemr/security/advisories/GHSA-rr38-hpxq-wwff"}],"revision":"9312c77172c3920375afa704f41ebd04a1656d428ca15da78d12462bc198ff02","sources":[{"modifiedAt":1794248298534,"name":"CNA: GitHub_M","retrievedAt":1794251300656,"url":"https://www.cve.org/CVERecord?id=CVE-2026-103021"},{"modifiedAt":1794000588800,"name":"NVD","retrievedAt":1794011054550,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103021"},{"modifiedAt":1790870155000,"name":"GitHub Security Advisories","retrievedAt":1794084309538,"url":"https://github.com/openemr/openemr/security/advisories/GHSA-rr38-hpxq-wwff"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794251328584,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-103021"}],"ssvc":{"assessedAt":1794248208236,"automatable":"yes","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"OpenEMR: Username Enumeration via Pre-Authentication User Settings Loading","updatedAt":1794251328584}