CVE-2026-56127

Summary

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.

Affected Software

Weaknesses

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://docs.netgate.com/downloads/pfSense-SA-26_10.webgui.asc
• https://docs.netgate.com/pfsense/en/latest/releases/26-07.html
• https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html
• https://www.vulncheck.com/advisories/pfsense-plus-ce-stored-xss-via-firewall-rules-edit-php

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