Medium [CVE-2026-56128] pfSense Plus < 26.07 / CE < 2.9.0 Stored XSS via firewall_schedule_edit.php
This medium-severity Netgate pfSense advisory covers CVE-2026-56128 affecting pfSense Plus, pfSense CE.
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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 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.
Affected products named by the advisory: pfSense CE.
- pfSense Plus before 26.07
- pfSense CE before 2.9.0
Official advisory · high-confidence parse· fetched 52 minutes ago·verify at source
- 26.07
- 2.9.0
Official advisory · high-confidence parse· fetched 52 minutes ago·verify at source
Mitigation
Upgrade to a fixed release: 26.07, 2.9.0. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 52 minutes ago·verify at source
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