CVE-2026-124484

HIGH 8.8

OpenEMR before 8.4.0 Missing Authorization in Portal Onsite-Document APIs

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-862
Vendor	openemr
Product	openemr
Published	Nov 8, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

openemr / openemr

0 < 8.4.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/openemr/openemr/security/advisories/GHSA-4r76-rq83-hgpg vulncheck.com: https://www.vulncheck.com/advisories/openemr-before-8.4.0-missing-authorization-in-portal-onsite-document-apis

Credits

christos-cantina-security L0stHeart