CVE-2026-42399 MEDIUM

CVE-2026-42399: Uncontrolled Resource Consumption in Kibana Leading to Denial of Service

Vendor Elastic
Product Kibana
Weakness CWE-400
Published May 28, 2026
Last update May 29, 2026

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated low-privileged user can cause Kibana to consume exponentially increasing amounts of memory by submitting a specially crafted Timelion visualization expression containing deeply chained function calls. The resulting data structure grows without bound, exhausting available memory and causing the Kibana service to crash and become unavailable to all users.

Key dates

02Disclosure timeline

May 28, 2026 CVE published
May 29, 2026 Record updated