CVE-2026-9165
HighCVSS 7.7Exploitation Probability (EPSS)
Low risk44th percentile - higher than 44% of all known CVEs
Summary
A flaw in Red Hat Advanced Cluster Security for Kubernetes (RHACS) allows an authenticated user with a valid API token to send deeply nested GraphQL queries, causing excessive resource consumption in Central and resulting in a denial of service for the management plane.
Risk Assessment
An attacker can exhaust Central's resources, preventing Kubernetes cluster management and security monitoring, leading to system downtime.
Recommendation
Update RHACS to a version containing the fix that limits GraphQL query depth and consider implementing additional rate-limiting mechanisms at the API level.
Other vulnerabilities in Red Hat Advanced Cluster Security for Kubernetes
See all- CVE-2026-103314High
In Red Hat Advanced Cluster Security for Kubernetes (RHACS), the Central SAML authentication ACS endpoint does not retain used SAML assertion or response identifiers to prevent replay. An attacker who obtains a valid, unexpired signed SAML response can submit it multiple times and receive distinct Central authentication tokens for the mapped identity.
- CVE-2026-10079High
A flaw was found in Red Hat Advanced Cluster Security for Kubernetes (RHACS) where processing Kubernetes Deployments replaces identity metadata based on the openshift.io/encoded-deployment-config label. A user with permission to create Deployments can set this label to "null", causing ACS to treat the workload as having empty UID, name, labels and namespace "default". This bypasses deploy-time policy detection and enforcement visibility, prevents correct persistence in Central and breaks violation reporting and compliance correlation for the affected deployment.
Original NVD description (English source)
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 data from NVD (NIST) · CISA KEV · EPSS