CVE-2026-26992

4.8 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. In versions 26.1.1 and below, the port group name is not sanitized, allowing attackers with admin privileges to perform Stored Cross-Site Scripting (XSS) attacks. When a user adds a port group, an HTTP POST request is sent to the Request-URI "/port-groups". The name of the newly created port group is stored in the value of the name parameter. After the port group is created, the entry is displayed along with relevant buttons such as Edit and Delete. 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:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/librenms/librenms/pull/19042
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-93fx-g747-695x
Source: security-advisories@github.com
Exploit Third Party Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
4.8 / 10.0
EPSS (Exploit Probability)
0.0%
2th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

librenms