---
id: CVE-2026-84189
title: >-
  LibreNMS through 26.4.0 renders JSON fields (name, ip, model, author, commit
  message) returned by the admin-configurable Oxidized integration URL
  (oxidized.url) into the device showconfig page without applying
  htmlspecialchars()
summary: >-
  LibreNMS through 26.4.0 renders JSON fields (name, ip, model, author, commit
  message) returned by the admin-configurable Oxidized integration URL
  (oxidized.url) into the device showconfig page without applying
  htmlspecialchars(). An admi…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/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-2026-84189'
references:
  - url: >-
      https://github.com/librenms/librenms/security/advisories/GHSA-7gww-x7fh-jf9j
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/librenms-before-26.7.0-stored-xss-via-oxidized-api
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/librenms/librenms/security/advisories/GHSA-7gww-x7fh-jf9j
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00382
epssPercentile: 0.29463
ingestedAt: '2026-09-08T21:11:12.289Z'
---

## Overview

LibreNMS through 26.4.0 renders JSON fields (name, ip, model, author, commit message) returned by the admin-configurable Oxidized integration URL (oxidized.url) into the device showconfig page without applying htmlspecialchars(). An administrator who points the Oxidized URL at an attacker-controlled server (SSRF) can cause it to return malicious JSON, resulting in stored/persistent cross-site scripting affecting all users who view any device's showconfig tab. Fixed in 26.7.0.

## Remediation

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