What’s Vulnerable › Vulnerabilities

CVE-2026-101919: Hypershift: hypershift: unsanitized kubeconfig passthrough from tenant namespace to control plane

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-05 · updated 2026-10-07
• Weakness: CWE-20

Description

A flaw was found in the HyperShift operator. The operator copies user-provided Kubernetes configuration (kubeconfig) secrets directly into the privileged control plane namespace without proper validation or sanitization. An authenticated user with cluster and secret creation permissions can exploit this vulnerability by supplying a configuration containing unauthorized executable plugins. When downstream controllers consume this configuration, an attacker can achieve arbitrary code execution within the control plane.

Affected products

• Red Hat Advanced Cluster Management for Kubernetes 2: all versions

References

• https://access.redhat.com/security/cve/CVE-2026-101919
• https://bugzilla.redhat.com/show_bug.cgi?id=2542541

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