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Advisory severityHigh7.7Red Hat Linux

High [CVE-2026-9165] Unbounded GraphQL query depth allows authenticated denial of service

This high-severity Red Hat Linux advisory covers CVE-2026-9165 affecting Red Hat Advanced Cluster Security 4.9, Red Hat Advanced Cluster Security for Kubernetes 4.10, Red Hat Advanced Cluster Security for Kubernetes 4.11.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-9165 Source published Source updated

VulniPulse record published Record updated

CVE-2026-9165
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

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Summary

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. Red Hat Product Security is aware of this issue affecting RHACS Central.

Red Hat is not aware of malicious exploitation of this issue outside of coordinated testing. Updates addressing this issue will be released according to the RHACS support lifecycle.

Refer to the associated errata when available for affected versions and update instructions. Red Hat severity: Important — CVSS 7.7 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H).

Weakness: CWE-400. Red Hat fixing advisory: RHSA-2026:36319, RHSA-2026:36625, RHSA-2026:36207.

Affected products named by the advisory: Red Hat Advanced Cluster Security 4.9; Red Hat Advanced Cluster Security for Kubernetes 4.10; Red Hat Advanced Cluster Security for Kubernetes 4.11.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 21 days ago·verify at source

Fixed versions
  • advanced-cluster-security/rhacs-main-rhel8:1783357116
  • advanced-cluster-security/rhacs-main-rhel8:1783357140
  • advanced-cluster-security/rhacs-main-rhel9:1783352589
  • RHSA-2026:36319
  • RHSA-2026:36625
  • RHSA-2026:36207

Official advisory · high-confidence parse· fetched 21 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • There is no complete mitigation other than installing the update once available.

Official advisory · high-confidence parse· fetched 21 days ago·verify at source

Discussion(0)

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