PT-2026-84155 · Librenms · Librenms

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CVE-2026-84192

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Published

2026-08-26

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Updated

2026-09-01

CVSS v3.1

7.1

High

VectorAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Name of the Vulnerable Software and Affected Versions LibreNMS versions prior to 26.3.1
Description Stored cross-site scripting occurs in legacy PHP templates that output SNMP-sourced and syslog-sourced data without proper escaping. An attacker controlling a monitored network device can inject arbitrary JavaScript through SNMP interface descriptions or syslog program fields, which then executes when authenticated users view the affected pages.
Recommendations Update to version 26.3.1.

Exploit

Fix

XSS

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Weakness Enumeration

Related Identifiers

CVE-2026-84192
GHSA-7W8C-QGXG-M7JX

Affected Products

Librenms