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CVE-2026-56127 Details

Description

pfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with the Firewall: Rules: Edit privilege to inject arbitrary JavaScript via the descr parameter in /firewall_rules_edit.php. The firewall rule description is stored in the pfSense XML configuration with only backslash-escaping applied and no HTML sanitization, then rendered without encoding in the firewall log table in /status_logs_filter.php. The payload executes in the browser of any user with the Status: Logs: Firewall privilege who views the affected log entries.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://docs.netgate.com/downloads/pfSense-SA-26_10.webgui.asc	[email protected]
https://docs.netgate.com/pfsense/en/latest/releases/26-07.html	[email protected]
https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html	[email protected]
https://www.vulncheck.com/advisories/pfsense-plus-ce-stored-xss-via-firewall-rules-edit-php	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 3, 2026	New CVE Received	[email protected]
Sep 3, 2026	CVE Modified	CISA-ADP