What is CVE-2026-0528?

CVE-2026-0528 is a medium-severity vulnerability in Elastic Metricbeat, classified under Improper Validation of Array Index. CVSS score: 6.5/10. Published 2026-01-13.

How severe is CVE-2026-0528?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Elastic Metricbeat

CVE-2026-0528

Improper Validation of Array Index (CWE-129) exists in Metricbeat can allow an attacker to cause a Denial of Service through Input Data Manipulation (CAPEC-153) via specially crafted, malformed payloads sent to the Graphite server metricse…

EPSS: 0.001 (28.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Elastic Metricbeat — versions 7.0.0, 8.0.0, 9.0.0

Weakness classification (CWE)

CWE-129 — Improper Validation of Array Index

References

discuss.elastic.co/t/metricbeat-8-19-10-9-1-10-9-2-4-security-update-esa-2026-0…

Frequently asked questions

What is CVE-2026-0528?: CVE-2026-0528 is a medium-severity vulnerability in Elastic Metricbeat, classified under Improper Validation of Array Index. CVSS score: 6.5/10. Published 2026-01-13.
How severe is CVE-2026-0528?: Medium severity. CVSS v3 base score is 6.5 out of 10.