OpenEMR up to 8.4.x Patient Search getByPatientDemographics field_id sql injection

Summaryinfo

A vulnerability has been found in OpenEMR up to 8.4.x and classified as critical. The affected element is the function getByPatientDemographics of the component Patient Search. This manipulation of the argument field_id causes sql injection. This vulnerability is registered as CVE-2026-126491. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in OpenEMR up to 8.4.x. Affected by this vulnerability is the function getByPatientDemographics of the component Patient Search. The manipulation of the argument field_id with an unknown input leads to a sql injection vulnerability. The CWE definition for the vulnerability is CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

OpenEMR before 8.5.0 contains a stored SQL injection vulnerability in getByPatientDemographics() where layout_options field_id values are concatenated into the patient search WHERE clause. Attackers with Layout Editor access can plant a malicious field_id, allowing any authenticated low-privilege user to exfiltrate data from patient_data and users_secure tables.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-126491 since 11/10/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1505 according to MITRE ATT&CK.

Upgrading to version 8.5.0 eliminates this vulnerability.

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Productinfo

Type

• Business Process Management Software

Name

• OpenEMR

Version

• 8.0
• 8.1
• 8.2
• 8.3
• 8.4

License

• open-source

Website

• Product: https://github.com/openemr/openemr/

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