CVE-2026-26931: Metricbeat Allocates Memory with Excessive Size Value Leading to Denial of Service

March 19, 2026

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).

References

discuss.elastic.co/t/metricbeat-8-19-13-9-2-5-security-update-esa-2026-09/385532
github.com/advisories/GHSA-5vrw-qjxw-89r5
github.com/elastic/beats
github.com/elastic/beats/commit/de072c4e371eafeb2a42d65b9ad513f666e4ffd7
nvd.nist.gov/vuln/detail/CVE-2026-26931

Code Behaviors & Features

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