---
id: CVE-2026-84193
title: >-
  LibreNMS through 26.2.0 contains a stored cross-site scripting vulnerability
  in legacy PHP template pages that render unescaped SNMP-sourced data fields
  including BGP peer descriptions, VRF names, process information, and SLA tags
summary: >-
  LibreNMS through 26.2.0 contains a stored cross-site scripting vulnerability
  in legacy PHP template pages that render unescaped SNMP-sourced data fields
  including BGP peer descriptions, VRF names, process information, and SLA tags.
  Attac…
severity: none
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-2026-84193'
references:
  - url: >-
      https://github.com/librenms/librenms/security/advisories/GHSA-v5jp-f342-234h
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/librenms-through-26.2.0-stored-cross-site-scripting-via-snmp
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/librenms/librenms/security/advisories/GHSA-v5jp-f342-234h
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00349
epssPercentile: 0.25699
ingestedAt: '2026-09-08T21:11:12.289Z'
---

## Overview

LibreNMS through 26.2.0 contains a stored cross-site scripting vulnerability in legacy PHP template pages that render unescaped SNMP-sourced data fields including BGP peer descriptions, VRF names, process information, and SLA tags. Attackers with device management access or network access to enroll a rogue SNMP device can inject malicious JavaScript that executes when admins view affected routing and device pages, enabling credential theft and CSRF token exfiltration.

## Remediation

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