Resource exhaustion in Red Hat Advanced Cluster Security 4

CVE-2026-9165

A flaw was found in Red Hat Advanced Cluster Security for Kubernetes (RHACS). Central does not limit the depth of GraphQL queries served on the authenticated GraphQL API. An authenticated user with a valid API token can send deeply nested queries that cause excessive resource consumption in Central, resulting in a denial of service for the management plane.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.003 (23.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-9165?
CVE-2026-9165 is a high-severity vulnerability in Red Hat Advanced Cluster Security 4, classified under Uncontrolled Resource Consumption. CVSS score: 7.7/10. Published 2026-07-06.
How severe is CVE-2026-9165?
High severity. CVSS v3 base score is 7.7 out of 10.