What’s Vulnerable › Vulnerabilities

CVE-2026-34491

• Severity: medium (CVSS 6.1 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-24 · updated 2026-10-14
• Weakness: CWE-79

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.

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

How to fix

Upgrade to a fixed version: Johnson Controls Metasys 14 14.1.5; Johnson Controls Metasys 15 15.0.1. Check the vendor advisory for mitigations.

References

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

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