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.
History

Fri, 20 Feb 2026 16:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*

Fri, 20 Feb 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 20 Feb 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Librenms
Librenms librenms
Vendors & Products Librenms
Librenms librenms

Fri, 20 Feb 2026 02:15:00 +0000

Type Values Removed Values Added
Description 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.
Title LibreNMS has Stored XSS in Alert Rule
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-02-20T01:25:31.936Z

Updated: 2026-02-20T15:34:55.873Z

Reserved: 2026-02-17T01:41:24.606Z

Link: CVE-2026-26989

cve-icon Vulnrichment

Updated: 2026-02-20T15:26:37.884Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-20T02:16:54.710

Modified: 2026-02-20T16:25:20.917

Link: CVE-2026-26989

cve-icon Redhat

No data.