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

CVSS 6.5 · Medium EPSS 0.04% · P12

Affected Version Matrix 2

VendorProductVersion RangeStatus
ElasticKibana8.0.0≤ 8.19.15affected
9.0.0≤ 9.3.4affected
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I. Basic Information for CVE-2026-42399

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 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.
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，可能导致低权限认证用户通过提交特制的Timelion可视化表达式导致内存耗尽和服务崩溃。
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 8.0.0 ~ 8.19.15 -

II. Public POCs for CVE-2026-42399

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III. Intelligence Information for CVE-2026-42399

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Other References for CVE-2026-42399 (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-2026-424006.5 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-2026-42399

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