CVE-2026-34728 phpMyFAQ: Path Traversal - Arbitrary File Deletion in MediaBrowserController
An attacker can delete arbitrary files on the server via path traversal in the media browser, potentially leading to data loss or service disruption.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-34728?
CVE-2026-34728 is a high-severity path traversal vulnerability in Phpmyfaq Phpmyfaq, published on 2 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
phpMyFAQ is an open source FAQ web application. Prior to version 4.1.1, the MediaBrowserController::index() method handles file deletion for the media browser. When the fileRemove action is triggered, the user-supplied name parameter is concatenated with the base upload directory path without any path traversal validation. The FILTER_SANITIZE_SPECIAL_CHARS filter only encodes HTML special characters (&, ', ", <, >) and characters with ASCII value < 32, and does not prevent directory traversal sequences like ../. Additionally, the endpoint does not validate CSRF tokens, making it exploitable via CSRF attacks. This issue has been patched in version 4.1.1.
Weakness: CWE-22
Which versions are affected by CVE-2026-34728?
2 open source packages ship an affected version, including phpmyfaq/phpmyfaq. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
phpmyfaq/phpmyfaq Packagist | All versions | 4.1.1 |
phpmyfaq/phpmyfaq Packagist | All versions | 4.1.1 |
Products include Phpmyfaq Phpmyfaq.
How do I fix CVE-2026-34728?
Upgrade phpmyfaq/phpmyfaq to 4.1.1 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-34728 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34728 exists.
Other vulnerabilities in Phpmyfaq Phpmyfaq
- CVE-2023-0310 Cross-site Scripting (XSS) - Stored in thorsten/phpmyfaq
- CVE-2022-4407 Cross-site Scripting (XSS) - Reflected in thorsten/phpmyfaq
- CVE-2017-11187 Security feature bypass in n/a
- CVE-2026-76213 phpMyFAQ before 4.1.7 2FA Brute-Force via Session-Scoped Throttle
- CVE-2026-76214 phpMyFAQ before 4.1.7 WebAuthn Replay Attack via Challenge
Sources
Also known as GHSA-38m8-xrfj-v38x.