What’s Vulnerable › Vulnerabilities

CVE-2026-16242: Hypershift: konnectivity proxy-server accepts agent connections without validating client certificates

Description

A flaw was found in the Konnectivity proxy-server configuration for hosted control planes. The agent-facing listener was started without --cluster-ca-cert (and without token-based agent authentication), so client certificates were not validated. A remote attacker who can reach the Konnectivity cluster endpoint could connect as an unauthenticated agent, join the routing pool, and potentially proxy, inspect, modify, or drop control-plane-to-node traffic.

Affected products

How to fix

Upgrade to a fixed version: Red Hat multicluster engine for Kubernetes 2.1 1784905766; Red Hat multicluster engine for Kubernetes 2.11 1784945966; Red Hat multicluster engine for Kubernetes 2.17 1784856942; Red Hat multicluster engine for Kubernetes 2.6 1784905804; Red Hat multicluster engine for Kubernetes 2.8 1784905783; Red Hat multicluster engine for Kubernetes 2.9 1784905769; Red Hat OpenShift Container Platform 4.18 1784912882; Red Hat OpenShift Container Platform 4.14 1787001690; Red Hat OpenShift Container Platform 4.15 1787055132; Red Hat OpenShift Container Platform 4.16 1785534428; Red Hat OpenShift Container Platform 4.17 1784914869; Red Hat OpenShift Container Platform 4.19 1784913720. Check the vendor advisory for mitigations.

References

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