---
id: CVE-2026-34491
title: >-
  Improper neutralization of input during web page generation ('cross-site
  scripting') vulnerability in Johnson Controls Metasys 14 and Johnson Controls
  Metasys 15 allows Cross Site Scripting.


  This issue affects Metasys 14: before 14.1.5;…
summary: >-
  Improper neutralization of input during web page generation ('cross-site
  scripting') vulnerability in Johnson Controls Metasys 14 and Johnson Controls
  Metasys 15 allows Cross Site Scripting.


  This issue affects Metasys 14: before 14.1.5;…
severity: none
cwe:
  - CWE-79
published: '2026-08-24'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-34491'
references:
  - url: >-
      https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories
    label: productsecurity@jci.com
tags:
  - nvd
epss: 0.00396
epssPercentile: 0.31959
ingestedAt: '2026-10-14T13:30:58.564Z'
---

## Overview

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Johnson Controls Metasys 14 and Johnson Controls Metasys 15 allows Cross Site Scripting.

This issue affects Metasys 14: before 14.1.5; Metasys 15: before 15.0.1.

## Remediation

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