---
id: CVE-2026-111228
title: >-
  Netgate pfSense CE from 2.7.1 through 2.9.0 contains a CRLF injection
  vulnerability in services_unbound_advanced.php that allows authenticated users
  with DNS Resolver: Advanced privilege to inject Unbound directives
summary: >-
  Netgate pfSense CE from 2.7.1 through 2.9.0 contains a CRLF injection
  vulnerability in services_unbound_advanced.php that allows authenticated users
  with DNS Resolver: Advanced privilege to inject Unbound directives. Attackers
  can embed …
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:L'
cwe:
  - CWE-93
vendor: Netgate
product: pfSense CE
affected:
  - pfsense_ce >= 2.7.1 <= 2.9.0
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:35.670'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111228'
references:
  - url: 'https://abraxaslabs.tech/research/pfsense-ce-leftovers'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/abraxas/pfsense-unbound-sock-timeout'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/unbound.inc#L590
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/services_unbound_advanced.php#L178
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/netgate-pfsense-ce-2.7.1-through-2.9.0-crlf-injection-via-services-unbound-advanced-php
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
  - exploit-available
ingestedAt: '2026-10-15T19:25:46.430Z'
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-15T20:02:29.677101Z'
---

## Overview

Netgate pfSense CE from 2.7.1 through 2.9.0 contains a CRLF injection vulnerability in services_unbound_advanced.php that allows authenticated users with DNS Resolver: Advanced privilege to inject Unbound directives. Attackers can embed CR/LF characters in the unvalidated sock_queue_timeout parameter, which is written raw into unbound.conf, to override local records and forwarding for all clients.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.