---
id: "CVE-2026-124484"
page: "https://infrastack.ai/live/CVE-2026-124484"
kind: "vulnerability"
aliases: ["CVE-2026-124484"]
title: "OpenEMR: authenticated users can read and overwrite other patients' documents"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["healthcare", "openemr", "patient-portal", "runtime", "self-hosted"]
not_affected_if: ["version-8.4.0-or-later"]
published_at: "2026-11-08T14:18:17+00:00"
first_seen_at: "2026-11-08T14:48:41+00:00"
updated_at: "2026-11-08T14:48:57+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124484", "first_seen_at": "2026-11-08T14:48:41+00:00"}]
exploit_sources: []
---

# OpenEMR: authenticated users can read and overwrite other patients' documents

Link for people: https://infrastack.ai/live/CVE-2026-124484 (this .md is for agents)

OpenEMR before 8.4.0 exposes portal onsite-document APIs without an authorization check. Any signed-in core user can list, read and overwrite other patients' portal documents, signatures and template data by omitting patientId and supplying arbitrary record IDs.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the OpenEMR version in the installation; versions before `8.4.0` are affected.

## Fix

- OpenEMR: upgrade to `8.4.0` or later

## Timeline

- 2026-11-08T14:48:41+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124484

## Documents

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

## From the sources

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.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_