Medium 5.7Published Mar 19, 2026

CVE-2026-26931Memory Allocation with Excessive Size Value in Metricbeat Leading to Denial of Service

Updated under an hour ago (Oct 27, 2026, 5:23 PM ET)

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It affects Elastic Metricbeat. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Elastic Metricbeat

Exploited in the last 30 days

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).

CVSS: 5.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-789
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: elastic
NVD analysis: Analyzed
Record last updated: Mar 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Elastic Metricbeat elastic:metricbeat (from the name)	from 8.0.0 through 8.19.12	CNA record
elastic metricbeat elastic:metricbeat	from 8.0.0 before 8.19.13; from 9.0.0 before 9.2.5	NVD

References

References

https://discuss.elastic.co/t/metricbeat-8-19-13-9-2-5-security-update-esa-2026-09/385532	mitigation, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.