cvedb.io
CVE-2026-26991
MEDIUM · CVSS 4.8
EPSS exploitation probability: 0%
Published 2026-02-20T03:15:59.977 · Last modified 2026-06-17T10:26:30.040

Summary

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. In versions 26.1.1 and below, the device group name is not sanitized, allowing attackers with admin privileges to perform Stored Cross-Site Scripting (XSS) attacks. When a user adds a device group, an HTTP POST request is sent to the Request-URI "/device-groups". The name of the newly created device group is stored in the value of the name parameter. After the device group is created, the entry is displayed along with relevant buttons such as Rediscover Devices, Edit, and Delete. This issue has been fixed in version 26.2.0.

Affected products

librenms — librenms

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.