CVE WatchSep 3, 2026

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 Jav

CVSS

5.4

Medium

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 3, 2026 · Last modified: Sep 3, 2026 · CWE-79

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

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