CVE-2026-34216
CtrlPanel: Authenticated Remote Code Execution via Dynamic Class Instantiation in SettingsController.php
Description
CtrlPanel is open-source billing software for hosting providers. In versions 1.1.1 and prior, the admin settings update endpoint accepted a fully qualified class name directly from user-supplied request input and used it for dynamic static method calls and object instantiation without any allowlist validation, allowing for authenticated Remote Code Execution. An authenticated admin-level user could supply an arbitrary class name available in the Composer autoloader, potentially triggering unintended constructor or magic method execution. The update() method reads settings_class directly from the HTTP request and passed it to new $settings_class() and $settings_class::getValidations() without verifying that the provided value corresponds to a legitimate settings class: Because PHP resolves class names against the Composer autoloader at runtime, any autoloadable class in the application or its dependencies could be instantiated. Depending on the classes available in the dependency tree, this can trigger unintended side effects through constructors or magic methods (__construct, __toString, __wakeup), following a PHP object injection / gadget chain pattern. This issue has been fixed in version 1.2.0.
INFO
Published Date :
May 19, 2026, 9:16 p.m.
Last Modified :
July 24, 2026, 9:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-34216
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update CtrlPanel to version 1.2.0.
- Verify that only trusted classes are used.
- Review application dependencies for potential risks.
Public PoC/Exploit Available at Github
CVE-2026-34216 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-34216.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34216 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-34216
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34216 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-34216 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: panel de Ctrlpanel-gg, Description: CtrlPanel es un software de facturación de código abierto para proveedores de alojamiento. En las versiones 1.1.1 y anteriores, el endpoint de actualización de la configuración de administrador aceptaba un nombre de clase completamente cualificado directamente de la entrada de solicitud proporcionada por el usuario y lo utilizaba para llamadas a métodos estáticos dinámicos e instanciación de objetos sin ninguna validación de lista de permitidos, lo que permitía la ejecución remota de código autenticada. Un usuario autenticado con nivel de administrador podía proporcionar un nombre de clase arbitrario disponible en el autocargador de Composer, lo que podía desencadenar la ejecución no intencionada de constructores o métodos mágicos. El método update() lee settings_class directamente de la solicitud HTTP y lo pasaba a new $settings_class() y $settings_class::getValidations() sin verificar que el valor proporcionado correspondiera a una clase de configuración legítima: Debido a que PHP resuelve los nombres de clase contra el autocargador de Composer en tiempo de ejecución, cualquier clase autocargable en la aplicación o sus dependencias podía ser instanciada. Dependiendo de las clases disponibles en el árbol de dependencias, esto puede desencadenar efectos secundarios no deseados a través de constructores o métodos mágicos (__construct, __toString, __wakeup), siguiendo un patrón de inyección de objetos PHP / cadena de gadgets. Este problema ha sido solucionado en la versión 1.2.0. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Ctrlpanel-gg', 'product': 'panel', 'versions': [{'status': 'affected', 'version': '< 1.2.0'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-34216', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-05-20T13:06:22.083678Z'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 20, 2026
Action Type Old Value New Value Added Reference https://github.com/Ctrlpanel-gg/panel/security/advisories/GHSA-vcg3-fjrx-rg5q -
New CVE Received by [email protected]
May. 19, 2026
Action Type Old Value New Value Added Description CtrlPanel is open-source billing software for hosting providers. In versions 1.1.1 and prior, the admin settings update endpoint accepted a fully qualified class name directly from user-supplied request input and used it for dynamic static method calls and object instantiation without any allowlist validation, allowing for authenticated Remote Code Execution. An authenticated admin-level user could supply an arbitrary class name available in the Composer autoloader, potentially triggering unintended constructor or magic method execution. The update() method reads settings_class directly from the HTTP request and passed it to new $settings_class() and $settings_class::getValidations() without verifying that the provided value corresponds to a legitimate settings class: Because PHP resolves class names against the Composer autoloader at runtime, any autoloadable class in the application or its dependencies could be instantiated. Depending on the classes available in the dependency tree, this can trigger unintended side effects through constructors or magic methods (__construct, __toString, __wakeup), following a PHP object injection / gadget chain pattern. This issue has been fixed in version 1.2.0. Added CVSS V3.1 AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-470 Added Reference https://github.com/Ctrlpanel-gg/panel/releases/tag/1.2.0 Added Reference https://github.com/Ctrlpanel-gg/panel/security/advisories/GHSA-vcg3-fjrx-rg5q