CVE-2026-33765 Pi-hole Web Interface has a Command Injection Vulnerability

High 8.9 Published 27 Mar 2026 Updated 2 Apr 2026

Attackers can execute arbitrary system commands with root privileges via unsanitized input in the Pi-hole web interface.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-33765?

CVE-2026-33765 is a high-severity command injection vulnerability in pi-hole web, published on 27 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. Versions prior to 6.0 have a critical OS Command Injection vulnerability in the savesettings.php file. The application takes the user-controlled $_POST['webtheme'] parameter and concatenates it directly into a system command executed via PHP's exec() function. Since the input is neither sanitized nor validated before being passed to the shell, an attacker can append arbitrary system commands to the intended pihole command. Furthermore, because the command is executed with sudo privileges, the injected commands will run with elevated (likely root) privileges. Version 6.0 patches the issue.

Weakness: CWE-78

Which versions are affected by CVE-2026-33765?

It affects 1 product.

Products include Pi-Hole Web Interface.

How do I fix CVE-2026-33765?

No fix has been published for CVE-2026-33765 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2026-33765 being exploited?

There is no known exploitation of CVE-2026-33765 in the wild and no public exploit code.

Sources

Also known as GHSA-828h-5x96-rqx7.