Auth bypass in Openemr
CVE-2026-124447
OpenEMR before 8.3.0 contains an insecure direct object reference vulnerability in OnsitePortalActivityController::Update() that checks the request's patientId instead of the stored record's owner. Authenticated portal patients can send PUT requests to the onsiteportalactivity API with another patient's activity id and their own patientId to disclose tableArgs and checksum data, overwrite narratives and status, and take ownership of the record.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published .
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
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-5hx3-92fw-6jm6) (vendor-advisory)
- GitHub Security Advisory (GHSA-x8rm-m66w-qhh5) (vendor-advisory)
- VulnCheck Advisory: OpenEMR before 8.3.0 IDOR via OnsitePortalActivityController Update Endpoint (third-party-advisory)
Frequently asked questions
- What is CVE-2026-124447?
- CVE-2026-124447 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-2026-124447?
- High severity. CVSS v3 base score is 8.1 out of 10.