{"id":"CVE-2026-56126","title":"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","summary":"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…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"published":"2026-09-03","updated":"2026-09-09","sourceUpdated":"2026-09-09T20:41:07.123","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-56126","references":[{"url":"https://docs.netgate.com/downloads/pfSense-SA-26_09.packages.asc","label":"disclosure@vulncheck.com"},{"url":"https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html","label":"disclosure@vulncheck.com"},{"url":"https://docs.netgate.com/pfsense/en/latest/releases/26-07.html","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/pfsense-plus-ce-stored-xss-via-status-monitoring-php","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00371,"epssPercentile":0.31015,"ingestedAt":"2026-09-05T20:44:36.316Z","slug":"CVE-2026-56126","body":"## Overview\n\npfSense 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}