CVE-2026-56126: pfSense Plus < 26.07 / CE < 2.9.0 Stored XSS via status_monitoring.php
Netgate · pfSense Plus
Vendor fix available · Affected: Netgate pfSense Plus · Exploitation: possible (1 to 10%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 64% of scored CVEs
DescriptionCVE.org
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.
Affected products2
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Netgate · pfSense Plusbefore 26.07
- Netgate · pfSense CEbefore 2.9.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Possible (1 to 10%). EPSS between 1% and 10%.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Weakness
- Cross-site Scripting
- Vendor
- Netgate
- Published
- September 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-56126 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.