What is CVE-2026-103021?

CVE-2026-103021 is a medium-severity vulnerability in Openemr, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-11-05.

How severe is CVE-2026-103021?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Openemr

CVE-2026-103021

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.

Vulnerability class: Information Disclosure

Published 2026-11-05 · last modified 2026-11-06.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Openemr — versions >= 6.0.0, < 8.3.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-103021?: CVE-2026-103021 is a medium-severity vulnerability in Openemr, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-11-05.
How severe is CVE-2026-103021?: Medium severity. CVSS v3 base score is 5.3 out of 10.