CVE-2026-63139: Elastic Kibana

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated low-privileged user can exploit an uncontrolled resource consumption vulnerability in Kibana's Canvas functionality by sending a specially crafted request, causing the Kibana server process to terminate and resulting in a denial of service for all users of the affected Kibana instance.

Affected products

• Elastic Kibana: from 8.19.0, before 8.19.19 (fixed in 8.19.19); from 9.3.0, before 9.3.8 (fixed in 9.3.8); from 9.4.0, before 9.4.4 (fixed in 9.4.4)

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