CVE-2026-34491

State: Published
Severity: 6.1 Medium
Published: Aug 24, 2026
Updated: Aug 25, 2026
Reserved: Mar 30, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.1 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U	jci

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
Metasys 14Johnson Controls	before 14.1.5Affected
Metasys 15Johnson Controls	before 15.0.1Affected

References

https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories

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