CVE-2026-78586: Elastic Kibana

Medium severity, CVSS 6.5. EPSS: 0.5% 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 with low-level privileges could submit a specially crafted request that causes Kibana to consume an unbounded amount of memory, rendering it unavailable to all users.

Affected products

• Elastic Kibana: from 8.0.0, before 8.19.16 (fixed in 8.19.16); from 9.0.0, before 9.3.5 (fixed in 9.3.5); from 9.4.0, before 9.4.2 (fixed in 9.4.2)

Published 2026-09-02. Last modified 2026-09-03.