Metricbeat Allocates Memory with Excessive Size Value Leading to Denial of Service (CVE-2026-26931) | HOL Guard CVE

Medium · CVSS 5.7CVE-2026-26931GHSA-5VRW-QJXW-89R5

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

Answer in brief

CVE-2026-26931 records a Medium severity (CVSS 5.7) vulnerability in Metricbeat Allocates Memory with Excessive Size Value Leading to Denial of Service. The current sources do not mark it as known exploited. The current feed maps github.com/elastic/beats/v7 (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Mar 19, 2026Updated Sep 10, 2026Source checked Sep 10, 2026First seen by HOL Sep 9, 2026Material review Sep 10, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.7
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 5.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps github.com/elastic/beats/v7 (go). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:elastic:metricbeat::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
github.com/elastic/beats/v7go	>=0 <7.0.0-alpha2.0.20260112100137-de072c4e371e	7.0.0-alpha2.0.20260112100137-de072c4e371e

Recommended response

Check inventory. Check lockfiles and deployed manifests for github.com/elastic/beats/v7.
Review the reported fix. Update github.com/elastic/beats/v7 to 7.0.0-alpha2.0.20260112100137-de072c4e371e if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Mar 19, 2026
Evidence: source:nvd:source_dates:source-dates:record
Source modified
Sep 10, 2026
Evidence: source:nvd:source_dates:source-dates:record
First seen by HOL
Sep 9, 2026

Sources and claim methodology

Upstream source 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).

Quoted source text, attributed separately from HOL analysis.