Is CVE-2026-56128 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-56128?

CVE-2026-56128 has a CVSS v3 severity of MEDIUM (5.4).

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CVE-2026-56128

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.