CVE-2026-56126
mediumpfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with the Status: Monitoring privilege to inject arbitrary JavaScript via graph configur…
pfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with the Status: Monitoring privilege to inject arbitrary JavaScript via graph configuration parameters in /status_monitoring.php. Multiple POST parameters including graph-left, graph-right, time-period, resolution, start-date, end-date, start-time, end-time, graph-type, invert, and refresh-interval are concatenated and written to the global pfSense XML configuration without sanitization, then echoed unsanitized into a JavaScript string context on page render. Because the setting is stored in the global configuration, the payload executes in the browser of every user who visits the Status: Monitoring page.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://docs.netgate.com/downloads/pfSense-SA-26_09.packages.asc disclosure@vulncheck.com
- https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html disclosure@vulncheck.com
- https://docs.netgate.com/pfsense/en/latest/releases/26-07.html disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/pfsense-plus-ce-stored-xss-via-status-monitoring-php disclosure@vulncheck.com