CVE-2026-26989

4.3 MEDIUM
Published: February 20, 2026 Modified: February 20, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/librenms/librenms/pull/19039
Source: security-advisories@github.com
Issue Tracking
https://github.com/librenms/librenms/releases/tag/26.2.0
Source: security-advisories@github.com
Product Release Notes
https://github.com/librenms/librenms/security/advisories/GHSA-6xmx-xr9p-58p7
Source: security-advisories@github.com
Exploit Third Party Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
4.3 / 10.0
EPSS (Exploit Probability)
0.0%
0th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

librenms