---
id: CVE-2026-78902
title: >-
  Cross Site Scripting vulnerability in Netgate pfSense 26.03.1-RELEASE allows
  an attacker to execute arbitrary code via the pfBlockerNG package
summary: >-
  Cross Site Scripting vulnerability in Netgate pfSense 26.03.1-RELEASE allows
  an attacker to execute arbitrary code via the pfBlockerNG package
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: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T17:17:14.540'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78902'
references:
  - url: >-
      https://www.netspi.com/blog/technical-blog/web-application-pentesting/cve-2026-78902-xss-to-rce-in-pfsense-with-one-dns-request/
    label: cve@mitre.org
  - url: >-
      https://www.netspi.com/blog/technical-blog/web-application-pentesting/cve-2026-78902-xss-to-rce-in-pfsense-with-one-dns-request/
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-25T16:47:32.317001Z'
ingestedAt: '2026-09-25T13:08:53.485Z'
epss: 0.00303
epssPercentile: 0.20692
---

## Overview

Cross Site Scripting vulnerability in Netgate pfSense 26.03.1-RELEASE allows an attacker to execute arbitrary code via the pfBlockerNG package

## Remediation

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