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

Moderate severity GitHub Reviewed Published Mar 19, 2026 to the GitHub Advisory Database • Updated Mar 19, 2026

Package

gomod github.com/elastic/beats/v7 (Go)

Affected versions

< 7.0.0-alpha2.0.20260112100137-de072c4e371e

Patched versions

7.0.0-alpha2.0.20260112100137-de072c4e371e

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).

References

Published by the National Vulnerability Database Mar 19, 2026
Published to the GitHub Advisory Database Mar 19, 2026
Last updated Mar 19, 2026
Reviewed Mar 19, 2026

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Adjacent
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS score

Weaknesses

Memory Allocation with Excessive Size Value

The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. Learn more on MITRE.

CVE ID

CVE-2026-26931

GHSA ID

GHSA-5vrw-qjxw-89r5

Source code

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