CVE-2026-26934: Elastic Kibana

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

Improper Validation of Specified Quantity in Input (CWE-1284) in Kibana can allow an authenticated attacker with view-only privileges to cause a Denial of Service via Input Data Manipulation (CAPEC-153). An attacker can send a specially crafted, malformed payload causing excessive resource consumption and resulting in Kibana becoming unresponsive or crashing.

Affected products

• Elastic Kibana: from 8.18.0, 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 2026-02-26. Last modified 2026-06-17.