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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | multicluster engine for Kubernetes 2.1 | — | — |
| Red Hat | multicluster engine for Kubernetes 2.11 | — | — |
| Red Hat | multicluster engine for Kubernetes 2.17 | — | — |
| Red Hat | multicluster engine for Kubernetes 2.6 | — | — |
| Red Hat | multicluster engine for Kubernetes 2.8 | — | — |
| Red Hat | multicluster engine for Kubernetes 2.9 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.14 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.15 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.16 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.17 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.18 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.19 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.20 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.21 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.22 | — | — |
| Red Hat | Logging Subsystem for Red Hat OpenShift | — | — |
| Red Hat | Multicluster Engine for Kubernetes | — | — |
| Red Hat | OpenShift API for Data Protection | — | — |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
References
- RHSA-2026:46885 vendor-advisory
- RHSA-2026:47388 vendor-advisory
- RHSA-2026:47728 vendor-advisory
- RHSA-2026:47735 vendor-advisory
- RHSA-2026:47949 vendor-advisory
- RHSA-2026:47953 vendor-advisory
- RHSA-2026:47974 vendor-advisory
- RHSA-2026:48284 vendor-advisory
- RHSA-2026:48657 vendor-advisory
- RHSA-2026:48670 vendor-advisory
- RHSA-2026:48676 vendor-advisory
- RHSA-2026:48693 vendor-advisory
- RHSA-2026:48699 vendor-advisory
- RHSA-2026:50758 vendor-advisory
- RHSA-2026:56789 vendor-advisory
- RHSA-2026:56912 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-16242 vdb-entry
- RHBZ#2502690 issue-tracking
- https://github.com/openshift/hypershift/pull/9031