CVE-2026-26931 - Vulnerability Details - OpenCVE

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).

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Elastic

Metricbeat

unaffected

Version	Status	Constraints
`8.0.0`	affected	≤ 8.19.12

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

Source	ID	Title
Github GHSA	GHSA-5vrw-qjxw-89r5	Metricbeat Allocates Memory with Excessive Size Value Leading to Denial of Service

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://discuss.elastic.co/t/metricbeat-8-19-13-9-2-5-security-update-esa-2026-09/385532

History

Thu, 19 Mar 2026 18:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 19 Mar 2026 17:15:00 +0000

Type	Values Removed	Values Added
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).
Title		Memory Allocation with Excessive Size Value in Metricbeat Leading to Denial of Service
Weaknesses		CWE-789
References		https://discuss.elastic.co/t/metricbeat-8-19-13-9-2-5-security-update-esa-2026-09/385532
Metrics		cvssV3_1 `{'score': 5.7, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: elastic

Published: 2026-03-19T17:05:57.514Z

Updated: 2026-03-19T17:20:38.549Z

Reserved: 2026-02-16T16:42:05.773Z

Link: CVE-2026-26931

Vulnrichment

Updated: 2026-03-19T17:20:35.484Z

NVD

Status : Received

Published: 2026-03-19T17:16:23.320

Modified: 2026-03-19T17:16:23.320

Link: CVE-2026-26931

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-789

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