CVE-2026-39932 openemr CVE debrief

Who should care

OpenEMR users, administrators, and security teams should be aware of this critical vulnerability and take immediate action to protect their installations. This vulnerability can be exploited by attackers to execute arbitrary operating system commands, potentially leading to unauthorized access, data breaches, or system compromise. Security teams should prioritize patching or mitigating this vulnerability to prevent potential attacks. Additionally, operators and platform administrators should review system logs and monitor for suspicious activity to detect potential exploitation attempts. Vulnerability management and security teams should assess the risk and implement compensating controls if necessary. IT teams responsible for OpenEMR installations should take immediate action to protect their systems and data. Security teams should also review and update their incident response plans to address potential exploitation of this vulnerability. OpenEMR users and administrators should stay informed about the vulnerability and any updates from the vendor. Security teams should consider implementing additional security measures, such as monitoring and detection tools, to help identify and respond to potential attacks. IT teams should also review and update their security policies and procedures to address the vulnerability and ensure compliance with regulatory requirements. Security teams should prioritize communication and collaboration with stakeholders to ensure a coordinated response to potential exploitation attempts. Security teams should also review and update their risk assessments to reflect the potential impact of this vulnerability on their systems and data. Security teams should consider implementing compensating controls, such as network segmentation or access controls, to reduce the risk of exploitation. Security teams should also review and update their incident response plans to address potential exploitation of this vulnerability. Security teams should prioritize patching or mitigating this vulnerability to prevent potential attacks. Security teams should also review and update their security policies and procedures to address the vulnerability and ens

Technical summary

OpenEMR through 8.2.0 contains a remote code execution vulnerability in the document category tree component (library/classes/Tree.class.php). Attackers can chain arbitrary SQL execution to alter the id column type to VARCHAR and insert a malicious PHP payload, which is then executed via an unsanitized eval() call whenever any page instantiates CategoryTree, including unauthenticated and low-privilege pages. This vulnerability allows authenticated administrators to execute arbitrary operating system commands.

Defensive priority

Authenticated administrators can execute arbitrary operating system commands via injecting PHP payloads into categories database table.

Recommended defensive actions

• Inventory OpenEMR installations for version 8.2.0 or earlier
• Restrict access to authenticated administrators
• Monitor for suspicious eval() calls
• Implement compensating controls for web server user privileges
• Review system logs for indicators of compromise
• Verify OpenEMR installations and review system logs for suspicious activity
• Track exceptions and retest remediated assets

Evidence notes

OpenEMR through 8.2.0 contains a remote code execution vulnerability in the document category tree component. Attackers can chain arbitrary SQL execution to alter the id column type to VARCHAR and insert a malicious PHP payload, which is then executed via an unsanitized eval() call. Evidence is limited to public sources and may not reflect the full scope of affected systems or potential impact. Defenders should verify OpenEMR installations, review system logs for suspicious activity, and monitor for indicators of compromise.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.