CVE-2026-126422
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Missing Authorization in OpenEMR Lets Users Modify Patient Lists

Publication date: 2026-11-13

Last updated on: 2026-11-13

Assigner: VulnCheck

Description
OpenEMR before 8.5.0 contains a missing authorization vulnerability in library/ajax/lists_touch.php that allows restricted authenticated users to mark another patient's clinical lists as reviewed. Attackers can submit arbitrary patient_id and type values to falsely record "None known" allergy, medication, or problem lists, misleading clinicians and skewing quality-measure calculations.

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Meta Information

Published
2026-11-13
Last Modified
2026-11-13
Generated
2026-11-13
AI Q&A
2026-11-13
EPSS Evaluated
N/A
NVD
CVE-2026-126422
EUVD
EUVD-2026-125021

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
openemr openemr to 8.5.0 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

OpenEMR before version 8.5.0 has a missing authorization flaw in library/ajax/lists_touch.php. Restricted authenticated users can mark another patient's clinical lists as reviewed by submitting arbitrary patient_id and type values. This falsely records 'None known' entries for allergy, medication, or problem lists, misleading clinicians and affecting quality-measure calculations.

Detection Guidance

Check OpenEMR versions before 8.5.0 for the vulnerable library/ajax/lists_touch.php file. Review server logs for unusual POST requests to this endpoint with arbitrary patient_id and type parameters. Monitor clinical list entries marked as 'None known' by users without proper authorization.

Impact Analysis

Attackers with low privileges can manipulate clinical data, making clinicians believe incorrect information. This may lead to wrong diagnoses, improper treatment decisions, and skewed quality metrics. Data integrity is compromised as falsified records appear as legitimate reviews.

Compliance Impact

This vulnerability may violate compliance requirements for accurate medical records. GDPR requires data accuracy, while HIPAA mandates integrity of protected health information. Falsified clinical lists could lead to non-compliance, legal risks, and penalties due to compromised patient data integrity.

Mitigation Strategies

Upgrade OpenEMR to version 8.5.0 or later immediately. Review and restrict user permissions to prevent unauthorized access to clinical lists. Implement input validation for patient_id and type parameters in the lists_touch.php endpoint.

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