CVE-2026-26931

MEDIUM5.7EPSS 0.02%

Metricbeat Allocates Memory with Excessive Size Value Leading to Denial of Service

Published: 3/19/2026Modified: 4/7/2026

Also known as:GHSA-5vrw-qjxw-89r5CGA-4394-p4m2-ww78GO-2026-4790

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).

Affected packages (3)

Go/github.com/elastic/beatsfrom 0
Go/github.com/elastic/beats/v7from 0, < 7.0.0-alpha2.0.20260112100137-de072c4e371e
Go/github.com/elastic/beats/v7from 0, < 7.0.0-alpha2.0.20260112100137-de072c4e371e

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM5.7	CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References (5)

ADVISORYhttps://github.com/advisories/GHSA-5vrw-qjxw-89r5
ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-26931
PATCHhttps://github.com/elastic/beats
WEBhttps://discuss.elastic.co/t/metricbeat-8-19-13-9-2-5-security-update-esa-2026-09/385532
WEBhttps://github.com/elastic/beats/commit/de072c4e371eafeb2a42d65b9ad513f666e4ffd7