---
id: CVE-2026-109352
title: >-
  LibreNMS before 26.9.0 contains a stored cross-site scripting vulnerability in
  includes/html/pages/device/wireless.inc.php, which echoes wireless sensor
  sensor_descr values, populated from SNMP DisplayString fields during
  discovery, into…
summary: >-
  LibreNMS before 26.9.0 contains a stored cross-site scripting vulnerability in
  includes/html/pages/device/wireless.inc.php, which echoes wireless sensor
  sensor_descr values, populated from SNMP DisplayString fields during
  discovery, into…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: librenms
product: librenms
affected:
  - librenms < 26.9.0
published: '2026-10-12'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T20:33:06.527'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109352'
references:
  - url: >-
      https://github.com/librenms/librenms/security/advisories/GHSA-ffjc-4fr5-47c6
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/librenms-before-26.9.0-stored-xss-via-wireless-sensor-description
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/librenms/librenms/security/advisories/GHSA-ffjc-4fr5-47c6
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.0024
epssPercentile: 0.15039
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-15T02:51:22.630612Z'
ingestedAt: '2026-10-12T18:00:08.211Z'
---

## Overview

LibreNMS before 26.9.0 contains a stored cross-site scripting vulnerability in includes/html/pages/device/wireless.inc.php, which echoes wireless sensor sensor_descr values, populated from SNMP DisplayString fields during discovery, into HTML without escaping. Attackers controlling a monitored device's SNMP agent can set values such as AI-AP-MIB::aiSSID to malicious JavaScript that executes when authenticated users view the device's Wireless tab, enabling session hijacking.

## Remediation

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