# CVE-2026-41228

> Vulnerability · severity: **CRITICAL** (CVSS 9.9).

## Description

Froxlor is open source server administration software. Prior to version 2.3.6, the Froxlor API endpoint `Customers.update` (and `Admins.update`) does not validate the `def_language` parameter against the list of available language files. An authenticated customer can set `def_language` to a path traversal payload (e.g., `../../../../../var/customers/webs/customer1/evil`), which is stored in the database. On subsequent requests, `Language::loadLanguage()` constructs a file path using this value and executes it via `require`, achieving arbitrary PHP code execution as the web server user. Version 2.3.6 fixes the issue.

## Key facts

- **CVE ID:** CVE-2026-41228
- **Published:** 2026-04-23
- **CVSS severity:** CRITICAL
- **CVSS base score:** 9.9
- **CWE codes:** CWE-98

## Affected products

- `froxlor:froxlor`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-41228

## Citation

> AI Analytics. CVE-2026-41228. Retrieved 2026-07-09 from https://api.ai-analytics.org/cve/CVE-2026-41228. Derived from NIST NVD. Licensed CC0.

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