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CVE-2026-26931— Memory Allocation with Excessive Size Value in Metricbeat Leading to Denial of Service

Quick assessment

Affected
Elastic Metricbeat
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 Metricbeat是荷兰Elastic公司的一个指标采集器。 Elastic Metricbeat存在安全漏洞，该漏洞源于Prometheus remote_write HTTP处理程序存在内存分配值过大问题，可能导致通过过度分配造成拒绝服务。

CVSS 5.7 · Medium EPSS 0.31% · P22

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-26931

Vulnerability Information
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Vulnerability Title
Memory Allocation with Excessive Size Value in Metricbeat Leading to Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
Memory Allocation with Excessive Size Value (CWE-789) in the Prometheus remote_write HTTP handler in Metricbeat can lead Denial of Service via Excessive Allocation (CAPEC-130).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
Vulnerability Title
Elastic Metricbeat 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elastic Metricbeat是荷兰Elastic公司的一个指标采集器。 Elastic Metricbeat存在安全漏洞，该漏洞源于Prometheus remote_write HTTP处理程序存在内存分配值过大问题，可能导致通过过度分配造成拒绝服务。
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 Metricbeat 8.0.0 ~ 8.19.12 -

II. Public POCs for CVE-2026-26931

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III. Intelligence Information for CVE-2026-26931

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Vendor Advisories for CVE-2026-26931 (1)

Same Patch Batch · Elastic · 2026-03-19 · 4 CVEs total

CVE-2026-26939 6.5 MEDIUM Missing Authorization in Kibana Leading to Unauthorized Endpoint Response Action Configura
CVE-2026-26940 6.5 MEDIUM Improper Validation of Specified Quantity in Input in Kibana Leading to Denial of Service
CVE-2026-26933 5.7 MEDIUM Improper Validation of Array Index in Packetbeat Leading to Denial of Service

IV. Related Vulnerabilities

Same product: Metricbeat
Same vendor: Elastic
Same weakness: CWE-789