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TI-2026-21418 Aliases CVE-2026-26931GHSA-5vrw-qjxw-89r5

Memory Allocation with Excessive Size Value in Metricbeat Leading to Denial of Service

Priority LOW 25CWE-789Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-789.

Summary

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).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00182 7th percentileScored 2026-11-07
Fix Fixed github.com/elastic/beats/v7 (Go): 7.0.0-alpha2.0.20260112100137-de072c4e371e

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ElasticMetricbeat8.0.0 – 8.19.12—No fix listedCNA
—github.com/elastic/beats/v7 (Go)before 7.0.0-alpha2.0.20260112100137-de072c4e371e7.0.0-alpha2.0.20260112100137-de072c4e371ePatch availableGHSA-5vrw-qjxw-89r5
  • Metricbeat VendorElastic Affected 8.0.0 – 8.19.12 Fixed in — No fix listed CNA
  • github.com/elastic/beats/v7 (Go) Vendor— Affected before 7.0.0-alpha2.0.20260112100137-de072c4e371e Fixed in 7.0.0-alpha2.0.20260112100137-de072c4e371e Patch available GHSA-5vrw-qjxw-89r5

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:elastic:metricbeat:*:*:*:*:*:*:*:*8.0.0 to before 8.19.13; 9.0.0 to before 9.2.5VulnerableElastic
  • cpe:2.3:a:elastic:metricbeat:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.19.13; 9.0.0 to before 9.2.5 Vulnerable ·Elastic

Remediation

  • Fix · GHSA-5vrw-qjxw-89r5 github.com/elastic/beats/v7 (Go) Fixed in 7.0.0-alpha2.0.20260112100137-de072c4e371e Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26931
  2. 2026-10-03 Alias added: GHSA-5vrw-qjxw-89r5

References

Advisory 2

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences