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CVE-2026-42400— Uncontrolled Resource Consumption in Kibana Leading to Denial of Service

CVSS 6.5 · Medium EPSS 0.04% · P12

Possible ATT&CK Techniques 1AI

T1496 · Resource Hijacking

Affected Version Matrix 3

VendorProductVersion RangeStatus
ElasticKibana9.4.0≤ 9.4.1affected
9.0.0≤ 9.3.4affected
8.0.0≤ 8.19.15affected
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I. Basic Information for CVE-2026-42400

Vulnerability Information
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Vulnerability Title
Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Elastic Kibana 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elastic Kibana是Elastic公司的一个可用数据可视化仪表板软件。 Elastic Kibana存在安全漏洞，该漏洞源于资源消耗不受控制，可能导致认证用户通过发送特制的压缩请求负载导致内存和CPU资源过度消耗，造成服务无响应或崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
ElasticKibana 9.4.0 ~ 9.4.1 -

II. Public POCs for CVE-2026-42400

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III. Intelligence Information for CVE-2026-42400

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Other References for CVE-2026-42400 (1)

Same Patch Batch · Elastic · 2026-05-28 · 10 CVEs total

CVE-2026-423987.7 HIGHServer-Side Request Forgery (SSRF) in Kibana Leading to Unauthorized Network Access
CVE-2026-490957.2 HIGHImproper Input Validation in Kibana Fleet Leading to Privilege Escalation
CVE-2026-334646.5 MEDIUMUncontrolled Resource Consumption in Kibana Leading to Denial of Service
CVE-2026-423996.5 MEDIUMUncontrolled Resource Consumption in Kibana Leading to Denial of Service
CVE-2026-490946.5 MEDIUMUncontrolled Resource Consumption in Kibana Leading to Denial of Service
CVE-2026-490936.3 MEDIUMServer-Side Request Forgery (SSRF) in Kibana Leading to Unauthorized Network Access
CVE-2026-334635.3 MEDIUMOperation on a Resource after Expiration or Termination in Kibana Leading to Unauthorized
CVE-2026-334624.6 MEDIUMPath Traversal in Kibana Leading to Unauthorized Deletion of User Accounts
CVE-2026-424014.1 MEDIUMImproper Neutralization of Input During Web Page Generation in Kibana Leading to Stored HT

IV. Related Vulnerabilities

Same product: Kibana
Same vendor: Elastic
Same weakness: CWE-400

V. Comments for CVE-2026-42400

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