---
id: CVE-2026-56128
title: >-
  pfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with
  the Firewall: Schedules: Edit privilege to inject arbitrary JavaScript via the
  descr parameter in /firewall_schedule_edit.php
summary: >-
  pfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with
  the Firewall: Schedules: Edit privilege to inject arbitrary JavaScript via the
  descr parameter in /firewall_schedule_edit.php. The schedule description is
  store…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2026-09-03'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:41:07.123'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56128'
references:
  - url: 'https://docs.netgate.com/downloads/pfSense-SA-26_11.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-firewall-schedule-edit-php
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.01052
epssPercentile: 0.62792
ingestedAt: '2026-09-09T21:22:45.565Z'
---

## Overview

pfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with the Firewall: Schedules: Edit privilege to inject arbitrary JavaScript via the descr parameter in /firewall_schedule_edit.php. The schedule description is stored without HTML sanitization and subsequently inserted into an HTML attribute value in /firewall_rules.php with only single-quote escaping applied, permitting double-quote breakout. The payload executes in the browser of any user with the Firewall: Rules privilege who views the rules list with the affected schedule attached.

## Remediation

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