CVE-2026-84190 LibreNMS before 26.5.0 Remote Code Execution via AboutController

LibreNMS versions before 26.5.0 contain a remote code execution vulnerability in the AboutController where the snmpget configuration parameter is passed to shellexec without proper validation. An authenticated administrator can modify the snmpget configuration to point to a malicious executable...

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...

EUVD-2026-69026

LibreNMS through 26.4.0 renders JSON fields name, ip, model, author, commit message returned by the admin-configurable Oxidized integration URL oxidized.url into the device showconfig page without applying htmlspecialchars. An administrator who points the Oxidized URL at an attacker-controlled...

CVE-2026-84189 LibreNMS before 26.7.0 Stored XSS via Oxidized API

LibreNMS through 26.4.0 renders JSON fields name, ip, model, author, commit message returned by the admin-configurable Oxidized integration URL oxidized.url into the device showconfig page without applying htmlspecialchars. An administrator who points the Oxidized URL at an attacker-controlled...

CVE-2026-84189 LibreNMS before 26.7.0 Stored XSS via Oxidized API

LibreNMS through 26.4.0 renders JSON fields name, ip, model, author, commit message returned by the admin-configurable Oxidized integration URL oxidized.url into the device showconfig page without applying htmlspecialchars. An administrator who points the Oxidized URL at an attacker-controlled...

CVE-2026-84189

LibreNMS through 26.4.0 is affected by a stored XSS in the Oxidized integration . JSON fields (name , ip , model , author , commit message ) returned by the admin-configurable oxidized.url are rendered into the device showconfig page without htmlspecialchars(). An administrator who points the Oxi...

CVE-2026-84188

LibreNMS versions ≤ 26.4.0 contain a stored cross-site scripting vulnerability in the graph_descr. configuration settings. The value is echoed verbatim without HTML escaping in includes/html/pages/graphs.inc.php, allowing an authenticated administrator to store a malicious HTML payload that execu...

EUVD-2026-69025

LibreNMS versions configuration settings, which are echoed verbatim without HTML escaping in includes/html/pages/graphs.inc.php. An administrator can store a malicious HTML payload that executes in the browser of any authenticated user who views the affected graph type. The issue is fixed in...

CVE-2026-84188 librenms before 26.7.0 Stored XSS via graph_descr settings

LibreNMS versions configuration settings, which are echoed verbatim without HTML escaping in includes/html/pages/graphs.inc.php. An administrator can store a malicious HTML payload that executes in the browser of any authenticated user who views the affected graph type. The issue is fixed in...

CVE-2026-84188 librenms before 26.7.0 Stored XSS via graph_descr settings

LibreNMS versions configuration settings, which are echoed verbatim without HTML escaping in includes/html/pages/graphs.inc.php. An administrator can store a malicious HTML payload that executes in the browser of any authenticated user who views the affected graph type. The issue is fixed in...

CVE-2026-55182

LibreNMS is a network monitoring system. In versions from 21.6.0 up to 26.5.0, the Signal alert transport is vulnerable to command injection because the signal-cli path and the Recipient field of an alert transport entry are insufficiently escaped before being passed to an exec call. An...

CVE-2026-45694

LibreNMS is a network monitoring system. In versions up to and including 26.4.0, the Proxmox application view is vulnerable to reflected cross-site scripting through the user-supplied instance and vmid GET parameters, which are reflected into the page title without adequate encoding. The paramete...

CVE-2026-55182 LibreNMS: Remote Code Execution by Signal Alert Transportation Module

LibreNMS is a network monitoring system. In versions from 21.6.0 up to 26.5.0, the Signal alert transport is vulnerable to command injection because the signal-cli path and the Recipient field of an alert transport entry are insufficiently escaped before being passed to an exec call. An...

CVE-2026-55182 LibreNMS: Remote Code Execution by Signal Alert Transportation Module

LibreNMS is a network monitoring system. In versions from 21.6.0 up to 26.5.0, the Signal alert transport is vulnerable to command injection because the signal-cli path and the Recipient field of an alert transport entry are insufficiently escaped before being passed to an exec call. An...

CVE-2026-55182

LibreNMS , a network monitoring system, is vulnerable to command injection in the Signal alert transport module (versions 21.6.0 through 26.5.0). The root cause lies in insufficiently escaped signal-cli path and Recipient field in the deliverAlert function of Signal.php, which are passed to unsaf...

CVE-2026-45694 LibreNMS: Reflected XSS in the Proxmox app view via unsanitized instance/vmid parameters

LibreNMS is a network monitoring system. In versions up to and including 26.4.0, the Proxmox application view is vulnerable to reflected cross-site scripting through the user-supplied instance and vmid GET parameters, which are reflected into the page title without adequate encoding. The paramete...

CVE-2026-45694 LibreNMS: Reflected XSS in the Proxmox app view via unsanitized instance/vmid parameters

LibreNMS is a network monitoring system. In versions up to and including 26.4.0, the Proxmox application view is vulnerable to reflected cross-site scripting through the user-supplied instance and vmid GET parameters, which are reflected into the page title without adequate encoding. The paramete...

CVE-2026-45694

LibreNMS (network monitoring system) is affected by a reflected XSS in the Proxmox application view (versions up to 26.4.0 ). The root cause is in LegacyController.php:75, where the page title is injected into a document.title JavaScript assignment via string interpolation. The instance and vmid ...

GHSA-7W8C-QGXG-M7JX LibreNMS — Stored XSS via SNMP/Syslog Data in Legacy Templates

Summary Multiple legacy PHP template files in LibreNMS directly output SNMP-sourced and syslog-sourced data into HTML without escaping. An attacker who controls a monitored network device via compromised SNMP agent or syslog sender can inject arbitrary JavaScript that executes when any...

CVE-2020-15876

An issue was discovered in LibreNMS 1.65. A remote authenticated attacker with normal privileges can extract all the information from the LibreNMS database via a SQL injection in the sort parameter in the /ajaxtable.php API endpoint. This affects address-search.inc.php, alertlog.inc.php,...