# CVE-2026-111217: Netgate pfSense CE through 2.9.0 OS Command Injection via CARP VHID

> Authenticated users with Virtual IP edit privileges can execute arbitrary commands as root via unvalidated CARP VHID input in pfSense CE.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Oct 2026
- **Updated:** 21 Oct 2026
- **Also known as:** GHSA-fffm-6286-c3r5

## What is CVE-2026-111217?

CVE-2026-111217 is a high-severity command injection vulnerability in Netgate pfSense CE, published on 15 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Netgate pfSense CE through 2.9.0 contains an OS command injection vulnerability that allows authenticated users with Virtual IP edit privileges to execute commands as root by storing an unvalidated CARP VHID. Attackers can supply a VHID containing shell metacharacters that executes via interface_ipalias_configure() ifconfig calls or get_carp_interface_status() when CARP status is rendered.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-111217?

It affects 1 product.


Products: Pfsense Pfsense.

## How do I fix CVE-2026-111217?

No fix has been published for CVE-2026-111217 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-111217 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111217 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-2026-111217 and fix it if it is affected.

What it is: CVE-2026-111217 is a high-severity command injection vulnerability in Netgate pfSense CE, published on 15 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111217 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-2026-111217/ (Markdown: https://insights.sbomify.com/CVE-2026-111217/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-111217
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-111217
- OSV: https://osv.dev/vulnerability/CVE-2026-111217

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-111217/
Summaries are generated and may contain mistakes; the official description above is the record.