CVE-2026-56128

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://docs.netgate.com/downloads/pfSense-SA-26_11.webgui.asc
https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html
https://docs.netgate.com/pfsense/en/latest/releases/26-07.html
https://www.vulncheck.com/advisories/pfsense-plus-ce-stored-xss-via-firewall-schedule-edit-php

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-03 15:17

Updated : 2026-09-09 20:41

NVD link : CVE-2026-56128

Mitre link : CVE-2026-56128

CVE.ORG link : CVE-2026-56128

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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