CVE-2026-103021

    Dashboard / Vulnerabilities / CVE-2026-103021

    CVE-2026-103021

    Published: 5 Nov 2026Last Modified: 8 Nov 2026

    Summary: OpenEMR: Username Enumeration via Pre-Authentication User Settings Loading

    Details: 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.

    References: https://github.com/openemr/openemr/releases/tag/v8_3_0, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103021.json, https://github.com/openemr/openemr/security/advisories/GHSA-rr38-hpxq-wwff, https://nvd.nist.gov/vuln/detail/CVE-2026-103021, https://github.com/openemr/openemr/commit/50f789fad45ada625fe8d0faf0c7a9c15ef52aa5, https://github.com/openemr/openemr/pull/13133

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 4c3f9f5917d765f944cdbf3b9df15375476b3711
    Fixed -ebb62eb3036a726314ab3e1c3e9263a41608b17b

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-103021 | CVE-DB