What is CVE-2026-124484?

CVE-2026-124484 is a high-severity vulnerability in Openemr, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-11-08.

How severe is CVE-2026-124484?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Openemr

CVE-2026-124484

OpenEMR before 8.4.0 contains a missing authorization vulnerability in portal onsite-document APIs that allows any authenticated core user to access cross-patient documents. Attackers can omit the patientId parameter and supply arbitrary record IDs to list, read, and overwrite other patients' portal documents, signatures, and template data.

Vulnerability class: Broken Access Control

Published 2026-11-08.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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-862 — Missing Authorization

References

GitHub Security Advisory (GHSA-4r76-rq83-hgpg) (vendor-advisory)
VulnCheck Advisory: OpenEMR before 8.4.0 Missing Authorization in Portal Onsite-Document APIs (third-party-advisory)

Frequently asked questions

What is CVE-2026-124484?: CVE-2026-124484 is a high-severity vulnerability in Openemr, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-11-08.
How severe is CVE-2026-124484?: High severity. CVSS v3 base score is 8.8 out of 10.