CVE-2026-34491 (GCVE-0-2026-34491)

Vulnerability from cvelistv5 – Published: 2026-08-24 17:24 – Updated: 2026-08-24 17:24
VLAI
Summary
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.
Severity
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
CWE
  • Improper neutralization of input during web page generation ('cross-site scripting')
Assigner
References
Impacted products
Vendor Product Version CPE status
Johnson Controls Metasys 14 Affected: 0 , < 14.1.5 (custom)
    cpe:2.3:a:johnson_controls:metasys_14:*:*:*:*:*:*:*:*
Create a notification for this product.
Johnson Controls Metasys 15 Affected: 0 , < 15.0.1 (custom)
    cpe:2.3:a:johnson_controls:metasys_15:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-24 17:17
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.