CVE-2026-34491: Johnson Controls Metasys 14

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Johnson Controls Metasys 14: before 14.1.5 (fixed in 14.1.5)
• Johnson Controls Metasys 15: before 15.0.1 (fixed in 15.0.1)

Published 2026-08-24. Last modified 2026-09-03.