---
id: CVE-2026-84188
title: >-
  LibreNMS versions <= 26.4.0 contain a stored cross-site scripting
  vulnerability in the graph_descr.<graphtype> configuration settings, which are
  echoed verbatim without HTML escaping in includes/html/pages/graphs.inc.php
summary: >-
  LibreNMS versions <= 26.4.0 contain a stored cross-site scripting
  vulnerability in the graph_descr.<graphtype> configuration settings, which are
  echoed verbatim without HTML escaping in includes/html/pages/graphs.inc.php.
  An administrato…
severity: medium
cvss: 4.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2026-09-01'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:18:59.270'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84188'
references:
  - url: >-
      https://github.com/librenms/librenms/security/advisories/GHSA-7cj5-v4pp-v632
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/librenms-before-26.7.0-stored-xss-via-graph-descr-settings
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/librenms/librenms/security/advisories/GHSA-7cj5-v4pp-v632
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00251
epssPercentile: 0.1493
ingestedAt: '2026-09-08T21:11:12.288Z'
---

## Overview

LibreNMS versions <= 26.4.0 contain a stored cross-site scripting vulnerability in the graph_descr.<graphtype> configuration settings, which are echoed verbatim without HTML escaping in includes/html/pages/graphs.inc.php. An administrator can store a malicious HTML payload that executes in the browser of any authenticated user who views the affected graph type. The issue is fixed in version 26.7.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.