CVE-2026-26992

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.

CVSS v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.7 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/librenms/librenms/commit/882fe6f90ea504a3732f83caf89bba7850a5699f	Patch
https://github.com/librenms/librenms/pull/19042	Issue Tracking
https://github.com/librenms/librenms/releases/tag/26.2.0	Product Release Notes
https://github.com/librenms/librenms/security/advisories/GHSA-93fx-g747-695x	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-20 03:16

Updated : 2026-02-20 16:20

NVD link : CVE-2026-26992

Mitre link : CVE-2026-26992

CVE.ORG link : CVE-2026-26992

JSON object : View

Products Affected

librenms

librenms

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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