CVE-2026-42397: Elastic Kibana

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). An authenticated user can submit a specially crafted request to affected Entity Analytics endpoints containing an oversized input value that causes excessive resource consumption, which may render Kibana unavailable.

Affected products

• Elastic Kibana: from 9.3.0, before 9.3.7 (fixed in 9.3.7); from 9.4.0, before 9.4.4 (fixed in 9.4.4)

Published 2026-07-21. Last modified 2026-08-06.