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

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

- **Severity:** High 8.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Mar 2026
- **Updated:** 2 Apr 2026
- **Also known as:** GHSA-828h-5x96-rqx7

## 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 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-33765?

It affects 1 product.


Products: 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.

## Is CVE-2026-33765 being exploited?

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

## Other vulnerabilities in pi-hole web

- [CVE-2023-23614](https://insights.sbomify.com/CVE-2023-23614/): Improper session handling of "Remember me for 7 days" functionality (high 8.8)
- [CVE-2025-59151](https://insights.sbomify.com/CVE-2025-59151/): Pi-hole Admin Interface vulnerable to HTTP response header injection via CRLF injection (high 8.2)
- [CVE-2021-3706](https://insights.sbomify.com/CVE-2021-3706/): Sensitive Cookie Without 'HttpOnly' Flag in pi-hole/adminlte (high 7.4)
- [CVE-2021-41175](https://insights.sbomify.com/CVE-2021-41175/): Stored XSS in Client Groups Management (Authenticated) (high 7.3)
- [CVE-2021-3811](https://insights.sbomify.com/CVE-2021-3811/): Cross-site Scripting (XSS) - Reflected in pi-hole/adminlte (medium 6.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-33765 and fix it if it is affected.

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

Affected product: pi-hole web. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-33765/ (Markdown: https://insights.sbomify.com/CVE-2026-33765/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-33765
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-33765
- OSV: https://osv.dev/vulnerability/CVE-2026-33765

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-33765/
Summaries are generated and may contain mistakes; the official description above is the record.