CVE-2026-126457
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OpenEMR Missing Authorization in InstallerController

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 InstallerController that allows any authenticated user to modify module administration settings without the admin/manage_modules permission. Low-privileged users such as Front Office clerks can POST to saveConfig, DeleteAcl, DeleteHooks and nickName actions to reconfigure or partially disable installed modules.

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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-2026-126457
EUVD
EUVD-2026-124966

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 versions before 8.5.0 have a missing authorization vulnerability in the InstallerController module. Any authenticated user, including low-privileged users like Front Office clerks, can modify module administration settings without the required admin/manage_modules permission. This is done by sending POST requests to actions such as saveConfig, DeleteAcl, DeleteHooks, and nickName to reconfigure or partially disable installed modules.

Detection Guidance

To detect this vulnerability, check OpenEMR versions before 8.5.0 for unauthorized POST requests to InstallerController actions like saveConfig, DeleteAcl, DeleteHooks, or nickName. Monitor server logs for these endpoints and verify if low-privileged users can access them.

Impact Analysis

Low-privileged users could reconfigure or disable critical modules, potentially disrupting system functionality. Sensitive data exposure or unauthorized changes to module settings may occur. The vulnerability allows partial module control without proper permissions, posing risks to system integrity and confidentiality.

Compliance Impact

This vulnerability could lead to unauthorized access or modifications, violating data integrity and confidentiality requirements in GDPR and HIPAA. Non-compliance may result from improper access controls, potentially exposing sensitive patient or user data.

Mitigation Strategies

Immediately upgrade OpenEMR to version 8.5.0 or later. If upgrading is not possible, apply a patch to add permission checks for the affected actions in InstallerController. Restrict access to administrative endpoints and review user permissions.

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