CVE-2026-26931

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

19/03/2026

Last modified:

20/03/2026

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).

Impact

Vector 3.x

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.70 MEDIUM
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.70

Severity 3.x

MEDIUM

References to Advisories, Solutions, and Tools

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