---
id: CVE-2026-67189
title: >-
  pfSense Plus before 26.07 and pfSense CE through 2.8.1 contain a stored
  cross-site scripting vulnerability in the Traffic Graphs top-talkers feature,
  where PTR records returned by reverse DNS lookups are incorporated without
  sanitization…
summary: >-
  pfSense Plus before 26.07 and pfSense CE through 2.8.1 contain a stored
  cross-site scripting vulnerability in the Traffic Graphs top-talkers feature,
  where PTR records returned by reverse DNS lookups are incorporated without
  sanitization…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2026-08-19'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:14:58.577'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67189'
references:
  - url: 'https://docs.netgate.com/downloads/pfSense-SA-26_21.webgui.asc'
    label: disclosure@vulncheck.com
  - url: 'https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html'
    label: disclosure@vulncheck.com
  - url: 'https://docs.netgate.com/pfsense/en/latest/releases/26-07.html'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/pfsense-plus-ce-stored-xss-via-traffic-graphs-ptr-record
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.01167
epssPercentile: 0.65927
ingestedAt: '2026-09-23T18:29:33.083Z'
---

## Overview

pfSense Plus before 26.07 and pfSense CE through 2.8.1 contain a stored cross-site scripting vulnerability in the Traffic Graphs top-talkers feature, where PTR records returned by reverse DNS lookups are incorporated without sanitization into AJAX responses and rendered as HTML through a DOM sink in the administrator interface. An attacker who controls a PTR record and generates sufficient traffic to appear as a top talker can execute arbitrary JavaScript in an administrator's browser, gaining access to the authenticated session context and same-origin access to the firewall management interface, enabling account creation and arbitrary OS command execution.

## Remediation

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