CVE-2026-26992 MEDIUM

CVE-2026-26992: LibreNMS has Stored Cross-Site Scripting via unsanitized /port-groups name

Vendor Librenms
Product librenms
Weakness CWE-79 · XSS
Published February 20, 2026
Last update February 20, 2026
View on NVD All CVEs

CVSS base score

5.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 20, 2026 CVE published
February 20, 2026 Record updated

Related vulnerabilities

04Related CVE

CVE-2023-4347 Cross-site Scripting (XSS) - Reflected in librenms/librenms CVE-2025-10584 Portabilis i-Educar educar_calendario_anotacao_cad.php cross site scripting CVE-2026-48268 Adobe Experience Manager | Cross-site Scripting (DOM-based XSS) (CWE-79) CVE-2020-5285 Reflected XSS with back parameter in PrestaShop CVE-2024-37360 Hitachi Vantara Pentaho Business Analytics Server - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')