OpenEMR up to 8.2.0 Document Category Tree Tree.class.php eval code injection

Summaryinfo

A vulnerability marked as critical has been reported in OpenEMR up to 8.2.0. This affects the function eval of the file library/classes/Tree.class.php of the component Document Category Tree. The manipulation leads to code injection. This vulnerability is listed as CVE-2026-39932. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in OpenEMR up to 8.2.0. It has been rated as critical. This issue affects the function eval of the file library/classes/Tree.class.php of the component Document Category Tree. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

OpenEMR through 8.2.0 contains a remote code execution vulnerability in the document category tree component (library/classes/Tree.class.php) that allows authenticated administrators to execute arbitrary operating system commands by injecting PHP payloads into the categories database table. 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, resulting in command execution as the web server user.

The advisory is shared at jivasecurity.com. The identification of this vulnerability is CVE-2026-39932 since 04/07/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/03/2026). MITRE ATT&CK project uses the attack technique T1059 for this issue.

By approaching the search of inurl:library/classes/Tree.class.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Business Process Management Software

Name

• OpenEMR

Version

• 8.0
• 8.1
• 8.2.0

License

• open-source

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