What is CVE-2026-124471?

CVE-2026-124471 is a high-severity vulnerability in Openemr, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-11-08.

How severe is CVE-2026-124471?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Openemr

CVE-2026-124471

OpenEMR before 8.3.0 contains a missing authorization vulnerability in interface/billing/sl_eob_invoice.php that allows any authenticated user to read and modify billing data for any encounter. Attackers can iterate the id parameter to read patient names and billing notes, and post payments, adjustments, deletions, or billing notes against any patient's account.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-11-08.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

GitHub Security Advisory (GHSA-55gc-5wj7-xxp7) (vendor-advisory)
VulnCheck Advisory: OpenEMR before 8.3.0 Missing Authorization and IDOR via sl_eob_invoice.php (third-party-advisory)

Frequently asked questions

What is CVE-2026-124471?: CVE-2026-124471 is a high-severity vulnerability in Openemr, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-11-08.
How severe is CVE-2026-124471?: High severity. CVSS v3 base score is 8.1 out of 10.