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CVE-2026-34491

Medium

Description

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.

SeverityMedium
CVSS6.1
Exploit probability—
ProductMetasys 14
PublishedAug 24, 2026
First seenAug 24, 2026
Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update
  • Johnson Controls Metasys 1414.1.5 or later
  • Johnson Controls Metasys 1515.0.1 or later

Affected products

ProductAffected versionsFixed in
Johnson Controls Metasys 14v < 14.1.514.1.5
Johnson Controls Metasys 15v < 15.0.115.0.1

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