CVE-2026-41236
Froxlor has privilege escalation in SSH key synchronization via symlinked `authorized_keys` path
Description
Froxlor is open source server administration software. Version 2.3.6 contains a symlink-following flaw in the root-owned SSH key synchronization path used for customer FTP users. The provisioning code appends public keys to `~/.ssh/authorized_keys` under a customer-controlled home directory without verifying that the target path is not a symbolic link. If an attacker controls a shell-enabled customer account and can modify files inside the assigned home directory, the attacker can replace `~/.ssh/authorized_keys` with a symlink to `/root/.ssh/authorized_keys`. When Froxlor's privileged cron task later synchronizes SSH keys, it appends the attacker-supplied key into root's authorized key file, resulting in root SSH access. Version 2.3.7 contains a patch.
INFO
Published Date :
June 4, 2026, 7:16 p.m.
Last Modified :
July 22, 2026, 8:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Froxlor to version 2.3.7.
- Verify SSH key synchronization logic.
- Ensure home directory paths are not symlinks.
- Apply vendor-provided patches.
Public PoC/Exploit Available at Github
CVE-2026-41236 has a 2 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-2026-41236.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-41236 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-2026-41236
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).
Agent-driven automated CVE discovery platform for source code auditing, vulnerability verification, and report generation.
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None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-41236 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-41236 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. 22, 2026
Action Type Old Value New Value Added Translation Title: Froxlor, Description: Froxlor es un software de administración de servidores de código abierto. La versión 2.3.6 contiene una falla de seguimiento de enlaces simbólicos en la ruta de sincronización de claves SSH propiedad de root utilizada para usuarios FTP de clientes. El código de aprovisionamiento añade claves públicas a ~/.ssh/authorized_keys en un directorio de inicio controlado por el cliente sin verificar que la ruta de destino no sea un enlace simbólico. Si un atacante controla una cuenta de cliente con acceso a shell y puede modificar archivos dentro del directorio de inicio asignado, el atacante puede reemplazar ~/.ssh/authorized_keys con un enlace simbólico a /root/.ssh/authorized_keys. Cuando la tarea cron privilegiada de Froxlor sincroniza posteriormente las claves SSH, añade la clave proporcionada por el atacante al archivo de claves autorizadas de root, lo que resulta en acceso SSH como root. La versión 2.3.7 contiene un parche. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'froxlor', 'product': 'froxlor', 'versions': [{'status': 'affected', 'version': '= 2.3.6'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-41236', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-08T14:31:23.498499Z'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 08, 2026
Action Type Old Value New Value Added Reference https://github.com/froxlor/froxlor/security/advisories/GHSA-mq5v-pxpm-8jw2 -
New CVE Received by [email protected]
Jun. 04, 2026
Action Type Old Value New Value Added Description Froxlor is open source server administration software. Version 2.3.6 contains a symlink-following flaw in the root-owned SSH key synchronization path used for customer FTP users. The provisioning code appends public keys to `~/.ssh/authorized_keys` under a customer-controlled home directory without verifying that the target path is not a symbolic link. If an attacker controls a shell-enabled customer account and can modify files inside the assigned home directory, the attacker can replace `~/.ssh/authorized_keys` with a symlink to `/root/.ssh/authorized_keys`. When Froxlor's privileged cron task later synchronizes SSH keys, it appends the attacker-supplied key into root's authorized key file, resulting in root SSH access. Version 2.3.7 contains a patch. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-59 Added Reference https://github.com/froxlor/froxlor/releases/tag/2.3.7 Added Reference https://github.com/froxlor/froxlor/security/advisories/GHSA-mq5v-pxpm-8jw2