CVE-2026-26989 — LibreNMS has Stored XSS in Alert Rule
LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below are affected by a Stored Cross-Site Scripting (XSS) vulnerability in the…
Published: 2026-02-20 · CVSS: 4.3 · CVSS 3.1
LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below are affected by a Stored Cross-Site Scripting (XSS) vulnerability in the Alert Rules workflow. An attacker with administrative privileges can inject malicious scripts that execute in the browser context of any user who accesses the Alert Rules page. This issue has been fixed in version 26.2.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7