CVE-2026-42399

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://discuss.elastic.co/t/kibana-8-19-16-and-9-3-5-security-update-esa-2026-36/386556	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:elastic:kibana::::::::
	cpe:2.3:a:elastic:kibana::::::::

History

14 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) El Consumo de Recursos Incontrolado (CWE-400) en Kibana puede conducir a una denegación de servicio a través de la Asignación Excesiva (CAPEC-130). Un usuario autenticado con bajos privilegios puede hacer que Kibana consuma cantidades de memoria que aumentan exponencialmente al enviar una expresión de visualización de Timelion especialmente diseñada que contiene llamadas a funciones profundamente encadenadas. La estructura de datos resultante crece sin límite, agotando la memoria disponible y provocando que el servicio de Kibana falle y quede no disponible para todos los usuarios.

Information

Published : 2026-05-28 21:16

Updated : 2026-10-14 20:10

NVD link : CVE-2026-42399

Mitre link : CVE-2026-42399

CVE.ORG link : CVE-2026-42399

JSON object : View

Products Affected

elastic

kibana

CWE

CWE-400

Uncontrolled Resource Consumption

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