Auth bypass in Openemr
CVE-2026-124480
OpenEMR before 8.4.0 contains an authorization bypass vulnerability that allows low-privileged authenticated users to read cross-patient FHIR QuestionnaireResponse data by sending the APICSRFTOKEN header. Attackers can reuse the session-exposed api_csrf_token_js value to skip FHIR scope checks and call GET /fhir/QuestionnaireResponse, exfiltrating site-wide questionnaire answer PHI.
Vulnerability class: Broken Access Control
Published .
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
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-5xf2-3h9x-f4m6) (vendor-advisory)
- VulnCheck Advisory: OpenEMR before 8.4.0 Authorization Bypass via FHIR QuestionnaireResponse APICSRFTOKEN (third-party-advisory)
Frequently asked questions
- What is CVE-2026-124480?
- CVE-2026-124480 is a high-severity vulnerability in Openemr, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-11-08.
- How severe is CVE-2026-124480?
- High severity. CVSS v3 base score is 8.8 out of 10.