Cross-site Scripting (XSS)

Overview librenms/librenms is a fully featured network monitoring system that provides a wealth of features and device support. Affected versions of this package are vulnerable to Cross-site Scripting XSS in the rendering of SNMP VRF fields such as mplsVpnVrfDescription, vrfname, and...

CVE-2026-84191 LibreNMS before 26.5.0 Stored XSS via SNMP VRF fields

LibreNMS before 26.5.0 contains stored cross-site scripting vulnerabilities in VRF display pages where mplsVpnVrfDescription, vrfname, and mplsVpnVrfRouteDistinguisher fields from SNMP polling are rendered without sanitization. Attackers controlling a monitored network device can inject arbitrary...

CVE-2026-84191

LibreNMS versions prior to 26.5.0 contain stored cross-site scripting (XSS) vulnerabilities in VRF display pages. The root cause is that SNMP-polled fields—mplsVpnVrfDescription , vrf_name , and mplsVpnVrfRouteDistinguisher —are rendered without sanitization. An attacker controlling a monitored n...