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CVE-2026-56128

pfSense Plus < 26.07 / CE < 2.9.0 Stored XSS via firewall_schedule_edit.php

Published: Sep 3, 2026Updated: Sep 3, 2026 Sources: CVE List NVDCWE-79
5.4MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 69.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

Netgate
commercial·US
pfSense PlusOn-premNetwork Device
Networking Infrastructure / router-switch
pfSense CEOn-premNetwork Device
Networking Infrastructure / firewall

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://docs.netgate.com/downloads/pfSense-SA-26_11.webgui.asc
docs.netgate.com
https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html
docs.netgate.com
https://docs.netgate.com/pfsense/en/latest/releases/26-07.html
docs.netgate.com
and 1 more references View all →

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