# CVE-2026-111233: Netgate pfSense CE 2.7.1 through 2.9.0 Reflected XSS via firewall_rules.php

> Remote attackers can execute arbitrary scripts in the pfSense WebGUI by luring privileged users to a crafted link, requiring a specific non-default configuration.

- **Severity:** Low 2.3 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Oct 2026
- **Updated:** 15 Oct 2026
- **Also known as:** GHSA-hvrf-cf2c-3rqh

## What is CVE-2026-111233?

CVE-2026-111233 is a low-severity cross-site scripting vulnerability in Netgate pfSense CE, published on 15 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Netgate pfSense CE 2.7.1 through 2.9.0 contains a reflected cross-site scripting vulnerability in firewall_rules.php that allows remote attackers to inject script via the unencoded if parameter. When the non-default Require Firewall Interface option is enabled, attackers can lure users with firewall rules privileges into opening a crafted GET link to execute script in the WebGUI with their privileges.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-111233?

It affects 1 product.


Products: Pfsense Pfsense.

## How do I fix CVE-2026-111233?

No fix has been published for CVE-2026-111233 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-111233 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111233 exists.

## Other vulnerabilities in Netgate pfSense CE

- [CVE-2025-69691](https://insights.sbomify.com/CVE-2025-69691/): Code injection in n/a (critical 9.9)
- [CVE-2023-29974](https://insights.sbomify.com/CVE-2023-29974/): Weak cryptography in n/a (critical 9.8)
- [CVE-2025-69690](https://insights.sbomify.com/CVE-2025-69690/): Deserialization in n/a (critical 9.1)
- [CVE-2021-41282](https://insights.sbomify.com/CVE-2021-41282/): Code injection in n/a (high 8.8)
- [CVE-2016-10709](https://insights.sbomify.com/CVE-2016-10709/): Command injection in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-111233 and fix it if it is affected.

What it is: CVE-2026-111233 is a low-severity cross-site scripting vulnerability in Netgate pfSense CE, published on 15 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111233 exists.

Affected product: Netgate pfSense CE. 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-2026-111233/ (Markdown: https://insights.sbomify.com/CVE-2026-111233/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-111233
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-111233
- OSV: https://osv.dev/vulnerability/CVE-2026-111233

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-111233/
Summaries are generated and may contain mistakes; the official description above is the record.