CVE-2026-26939: Elastic Kibana

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Missing Authorization (CWE-862) in Kibana’s server-side Detection Rule Management can lead to Unauthorized Endpoint Response Action Configuration (host isolation, process termination, and process suspension) via CAPEC-1 (Accessing Functionality Not Properly Constrained by ACLs). This requires an authenticated attacker with rule management privileges.

Affected products

• Elastic Kibana: from 8.0.0, before 8.19.12 (fixed in 8.19.12); from 9.0.0, before 9.2.6 (fixed in 9.2.6); version 9.3.0 only

Published 2026-03-19. Last modified 2026-06-17.