PT-2026-26314 · Elastic+1 · Metricbeat+1

Ismisepaul + 1 · Published 2026-03-19 · Updated 2026-04-20 · CVE-2026-26931

Positive Technologies (AI Summary)

CVSS v3.1

5.7

Medium

Base vector

AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Metricbeat (affected versions not specified)

Description A memory allocation issue exists within the Prometheus remote write HTTP handler in Metricbeat. This issue, categorized as excessive allocation (CAPEC-130), can lead to a denial of service (CWE-789). The problem stems from a memory allocation with an excessively large size value.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Weakness Enumeration

CWE-789

Related Identifiers

CVE-2026-26931

GHSA-5VRW-QJXW-89R5

GO-2026-4790

Affected Products

Metricbeat

Red Os

References · 11

• https://nvd.nist.gov/vuln/detail/CVE-2026-26931 · Security Note
• https://osv.dev/vulnerability/GHSA-5vrw-qjxw-89r5 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2026-4790 · Vendor Advisory
• https://github.com/elastic/beats · Note
• https://github.com/elastic/beats/commit/de072c4e371eafeb2a42d65b9ad513f666e4ffd7 · Note
• https://discuss.elastic.co/t/metricbeat-8-19-13-9-2-5-security-update-esa-2026-09/385532 · Note
• https://twitter.com/CVEnew/status/2036024195377955044 · Twitter Post
• https://twitter.com/cyberbivash/status/2034703204462530644 · Twitter Post
• https://github.com/advisories/GHSA-5vrw-qjxw-89r5 · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/uyazvimost-beats-cve-2026-26931-7.3 · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti-red-os-8-0/uyazvimost-beats-cve-2026-26931-8.0 · Note