CVE-2026-34055 OpenEMR has IDOR in Patient Notes Web UI allows unauthorized note access/modification

High 8.1 Published 25 Mar 2026 Updated 26 Mar 2026

Attackers can access or modify patient notes belonging to other patients by manipulating note IDs in the web UI due to missing authorization checks.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-34055?

CVE-2026-34055 is a high-severity missing authorization vulnerability in Open-Emr Openemr, published on 25 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0.3, the legacy patient notes functions in `library/pnotes.inc.php` perform updates and deletes using `WHERE id = ?` without verifying that the note belongs to a patient the user is authorized to access. Multiple web UI callers pass user-controlled note IDs directly to these functions. This is the same class of vulnerability as CVE-2026-25745 (REST API IDOR), but affects the web UI code paths. Version 8.0.0.3 patches the issue.

Weakness: CWE-639

Which versions are affected by CVE-2026-34055?

It affects 1 product.

Products include Open-Emr Openemr.

How do I fix CVE-2026-34055?

No fix has been published for CVE-2026-34055 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-34055 being exploited?

There is no known exploitation of CVE-2026-34055 in the wild and no public exploit code.

All Open-Emr Openemr vulnerabilities

Sources

Also known as GHSA-8gj5-r8vm-mghq.