CVE-2026-34491

Cross‑Site Scripting Vulnerability in Johnson Controls Metasys 14 and 15

Published Aug 24, 2026 CVSS 4.0 · 6.1 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Johnsoncontrols
Johnsoncontrols metasys
Vendors & Products Johnsoncontrols
Johnsoncontrols metasys
Type Values Removed Values Added
Title Cross‑Site Scripting Vulnerability in Johnson Controls Metasys 14 and 15
Weaknesses CWE-79
Type Values Removed Values Added
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.
First Time appeared Johnson Controls
Johnson Controls metasys 14
Johnson Controls metasys 15
CPEs cpe:2.3:a:johnson_controls:metasys_14:*:*:*:*:*:*:*:*
cpe:2.3:a:johnson_controls:metasys_15:*:*:*:*:*:*:*:*
Vendors & Products Johnson Controls
Johnson Controls metasys 14
Johnson Controls metasys 15
References
Metrics cvssV4_0

{'score': 6.1, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
jci
Published
Updated
Aug 25, 2026, 5:33 PM
Reserved
Mar 30, 2026, 8:25 AM
Status
Awaiting Analysis
Published
Aug 24, 2026, 6:17 PM
Modified
Oct 14, 2026, 1:10 PM