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CVE-2026-63260— Uncontrolled Resource Consumption in Kibana Leading to Denial of Service

Quick assessment

Affected
Elastic Kibana
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Elastic kibana是荷兰Elastic公司开源的一个数据可视化平台。 Kibana 9.0.0版本至9.3.7版本、8.0.0版本至8.19.18版本和9.4.0版本至9.4.3版本存在资源管理错误漏洞，该漏洞源于资源消耗不受控制，可能导致经过身份验证的低权限攻击者通过发送特制超大请求有效负载，导致资源密集型内存分配耗尽堆内存，造成Kibana崩溃并拒绝服务。

CVSS 6.5 · Medium EPSS 0.47% · P38

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 3

VendorProduct Version RangeStatus
Elastic Kibana 9.0.0≤ 9.3.7 affected
8.0.0≤ 8.19.18 affected
9.4.0≤ 9.4.3 affected
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I. Basic Information for CVE-2026-63260

Vulnerability Information
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Vulnerability Title
Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated attacker with low-privilege access can trigger a denial of service condition in Kibana by sending a specially crafted, oversized request payload. Processing this user-supplied input requires resource-intensive memory allocation that can exhaust the available heap memory in the Kibana process, causing it to crash and become unavailable to all users.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Elastic Kibana 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elastic kibana是荷兰Elastic公司开源的一个数据可视化平台。 Kibana 9.0.0版本至9.3.7版本、8.0.0版本至8.19.18版本和9.4.0版本至9.4.3版本存在资源管理错误漏洞，该漏洞源于资源消耗不受控制，可能导致经过身份验证的低权限攻击者通过发送特制超大请求有效负载，导致资源密集型内存分配耗尽堆内存，造成Kibana崩溃并拒绝服务。
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

Vendor Product Affected Versions CPE Subscribe
Elastic Kibana 9.0.0 ~ 9.3.7 -

II. Public POCs for CVE-2026-63260

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III. Intelligence Information for CVE-2026-63260

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Vendor Advisories for CVE-2026-63260 (1)

Same Patch Batch · Elastic · 2026-07-21 · 19 CVEs total

CVE-2026-56147 7.1 HIGH Authorization Bypass Through User-Controlled Key in Kibana Leading to Unauthorized Informa
CVE-2026-42397 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Servic
CVE-2026-63263 6.5 MEDIUM Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
CVE-2026-63261 6.5 MEDIUM Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
CVE-2026-63144 6.5 MEDIUM Uncontrolled Recursion in Elasticsearch Leading to Denial of Service
CVE-2026-63140 6.5 MEDIUM Reachable Assertion in Elasticsearch Leading to Denial of Service
CVE-2026-63136 6.5 MEDIUM Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
CVE-2026-63139 6.5 MEDIUM Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
CVE-2026-56145 6.5 MEDIUM Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
CVE-2026-63141 6.3 MEDIUM Missing Authorization in Kibana Leading to Unauthorized Access to Cloud Connect Management
CVE-2026-56146 5.4 MEDIUM Improper Access Control in Kibana Leading to Unauthorized Data Modification and Informatio
CVE-2026-56144 5.3 MEDIUM Incorrect Authorization in Elasticsearch Leading to Information Disclosure
CVE-2026-63142 5.0 MEDIUM Incomplete List of Disallowed Inputs in Kibana Leading to Server-Side Request Forgery
CVE-2026-63143 4.3 MEDIUM Missing Authorization in Kibana Leading to Unauthorized Information Disclosure
CVE-2026-63259 4.3 MEDIUM Authorization Bypass Through User-Controlled Key in Kibana Leading to Information Disclosu
CVE-2026-63145 4.3 MEDIUM Incorrect Authorization in Kibana Leading to Machine Learning Audit Log Integrity Compromi
CVE-2026-63262 4.3 MEDIUM Missing Authorization in Kibana Leading to Information Disclosure
CVE-2026-49092 4.3 MEDIUM Unintended Proxy or Intermediary ('Confused Deputy') in Kibana Leading to Unauthorized Inf

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-63260

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