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Kibana CVE-2026-42400

| EUVD-2026-33030 MEDIUM
Uncontrolled Resource Consumption (CWE-400)
2026-05-28 elastic GHSA-mhgf-jqhm-p7p3
6.5
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

1
Analysis Generated
May 28, 2026 - 21:32 vuln.today

DescriptionNVD

Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user can send a specially crafted compressed request payload that is processed prior to authorization checks, causing excessive memory and CPU resource consumption that can result in a Kibana instance becoming unresponsive or crashing.

AnalysisAI

Denial of service in Kibana allows any authenticated user to crash or render unresponsive a Kibana instance by sending a specially crafted compressed HTTP request payload. The root cause is an architectural ordering flaw: compressed payloads are decompressed and processed before authorization checks are applied, enabling resource exhaustion (CWE-400, CAPEC-130 Excessive Allocation) at minimal privilege cost. …

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CVE-2026-42400 vulnerability details – vuln.today

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