Vulnerability · Published Aug 24, 2026 · Assigned by jci
CVE-2026-34491
Medium 6.1
In plain English
A medium-severity cross-site scripting in Metasys 14 from Johnson Controls. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).
Severity (CVSS 4.0)6.1Medium
Exploit odds (30 days)0.4%top 66.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Johnson Controls | Metasys 14 | 0 – before 14.1.5 |
| Johnson Controls | Metasys 15 | 0 – before 15.0.1 |
Weakness: CWE-79 · 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