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CVE-2026-56150— Allocation of Resources Without Limits or Throttling in Fleet Server Leading to Denial of Service

Quick assessment

Affected
Elastic Fleet Server
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 Fleet Server是荷兰Elastic公司开源的一个设备集中管理服务。 Elastic Fleet Server 9.0.0至9.2.4版本和8.0.0至8.19.10版本存在资源管理错误漏洞，该漏洞源于资源无限制分配或节流问题，可能导致攻击者向上传端点提交特制请求，造成大量内存消耗，从而使得Fleet Server无法使用。

CVSS 6.5 · Medium EPSS 0.48% · P39

Affected Version Matrix 2

VendorProduct Version RangeStatus
Elastic Fleet Server 9.0.0≤ 9.2.4 affected
8.0.0≤ 8.19.10 affected
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I. Basic Information for CVE-2026-56150

Vulnerability Information
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Vulnerability Title
Allocation of Resources Without Limits or Throttling in Fleet Server Leading to Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
Allocation of Resources Without Limits or Throttling (CWE-770) in Fleet Server can lead to a denial of service via Excessive Allocation (CAPEC-130). An attacker can submit a specially crafted request to an upload endpoint that causes excessive memory consumption, which may render Fleet Server unavailable.
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
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Elastic Fleet Server 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elastic Fleet Server是荷兰Elastic公司开源的一个设备集中管理服务。 Elastic Fleet Server 9.0.0至9.2.4版本和8.0.0至8.19.10版本存在资源管理错误漏洞，该漏洞源于资源无限制分配或节流问题，可能导致攻击者向上传端点提交特制请求，造成大量内存消耗，从而使得Fleet Server无法使用。
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 Fleet Server 9.0.0 ~ 9.2.4 -

II. Public POCs for CVE-2026-56150

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III. Intelligence Information for CVE-2026-56150

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Vendor Advisories for CVE-2026-56150 (1)

Same Patch Batch · Elastic · 2026-07-01 · 9 CVEs total

CVE-2026-49091 8.0 HIGH Improper Output Neutralization for Logs in Kibana Leading to Log Injection
CVE-2026-49090 6.5 MEDIUM Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
CVE-2026-49087 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Servic
CVE-2026-56148 6.5 MEDIUM Uncontrolled Recursion in Elasticsearch Leading to Denial of Service
CVE-2026-56151 6.5 MEDIUM Improper Input Validation in Kibana Leading to Denial of Service
CVE-2026-56152 5.3 MEDIUM Incorrect Authorization in Kibana Leading to Information Disclosure
CVE-2026-56149 4.9 MEDIUM Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of
CVE-2026-49088 4.4 MEDIUM Insertion of Sensitive Information into Log File in Kibana Leading to Information Disclosu

IV. Related Vulnerabilities

Same product: Fleet Server
Same vendor: Elastic
Same weakness: CWE-770

V. Comments for CVE-2026-56150

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