High severity · published Jan 13, 2026
CVE-2026-0528
Improper Input Validation in Metricbeat Leading to Denial of Service
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
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 metricset or Zookeeper server metricset. Additionally, Improper Input Validation (CWE-20) exists in the Prometheus helper module that can allow an attacker to cause a Denial of Service through Input Data Manipulation (CAPEC-153) via specially crafted, malformed metric data.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
Metricbeat · Elastic
7.0.0 through 7.17.29; 8.0.0 through 8.19.9; 9.0.0 through 9.1.9; 9.2.0 through 9.2.3 · source: vendor
KI
Kibana · Elastic
7.0.0 before 7.17.29; 8.0.0 before 8.19.10; 9.0.0 before 9.1.10; 9.2.0 before 9.2.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0528
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-0528
Vendor Advisory
https://discuss.elastic.co/t/metricbeat-8-19-10-9-1-10-9-2-4-security-update-esa-2026-01/384519
More from Metricbeat
5.7
CVE-2026-26931
Memory Allocation with Excessive Size Value in Metricbeat Leading to Denial of Service