---
id: "CVE-2026-126434"
page: "https://infrastack.ai/live/CVE-2026-126434"
kind: "vulnerability"
aliases: ["CVE-2026-126434"]
title: "OpenEMR: missing permission check exposes and alters other patients' lab orders"
severity: "high"
cvss: 8.6
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["healthcare", "openemr", "runtime", "self-hosted"]
not_affected_if: ["version-8.5.0-or-later"]
published_at: "2026-11-13T10:17:50+00:00"
first_seen_at: "2026-11-13T10:47:22+00:00"
updated_at: "2026-11-13T10:50:48+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126434", "first_seen_at": "2026-11-13T10:47:22+00:00"}]
exploit_sources: []
---

# OpenEMR: missing permission check exposes and alters other patients' lab orders

Link for people: https://infrastack.ai/live/CVE-2026-126434 (this .md is for agents)

OpenEMR before 8.5.0 fails to check the patients/lab permission in its procedure order form, so any logged-in account can view and change other patients' procedure orders. An attacker can read clinical history or falsify diagnoses, instructions and order status.

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

## How to check

- Check the installed OpenEMR version (`version` in `version.php` or the admin footer); versions below `8.5.0` are affected.
- Confirm whether `interface/forms/procedure_order/common.php` is present and reachable by authenticated users.

## Fix

- OpenEMR: move to `8.5.0` or later.

## Timeline

- 2026-11-13T10:47:22+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126434

## Documents

- [advisory] Vendor advisory: github.com https://github.com/openemr/openemr/security/advisories/GHSA-q5c6-96vf-rx9v
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/openemr-before-8.5.0-missing-authorization-in-procedure-order-form

## From the sources

OpenEMR before 8.5.0 contains a missing authorization vulnerability in interface/forms/procedure_order/common.php that allows authenticated accounts lacking patients/lab permission to read and modify other patients' procedure orders. Attackers can request a global order id to disclose clinical history, or select the target patient in their session and submit bn_save to falsify diagnoses, instructions, and order status.

---

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