# CVE-2026-16242

## Summary

- **CVE ID:** CVE-2026-16242
- **Severity:** CRITICAL
- **CVSS Score:** 9.4 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L)
- **CWE:** CWE-306
- **Published:** Jul 20, 2026
- **Last Modified:** Sep 14, 2026

## 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

- Red Hat — multicluster engine for Kubernetes 2.10 (1784905766)
- Red Hat — multicluster engine for Kubernetes 2.8 (1784905783)
- Red Hat — multicluster engine for Kubernetes 2.9 (1784905769)
- Red Hat — multicluster engine for Kubernetes 2.11 (1784945966)
- Red Hat — multicluster engine for Kubernetes 2.6 (1784905804)
- Red Hat — multicluster engine for Kubernetes 2.17 (1784856942)
- Red Hat — multicluster engine for Kubernetes 2.1 (1784905766)
- Red Hat — multicluster engine for Kubernetes 2.11.0 (1784945966)
- Red Hat — Red Hat OpenShift Container Platform 4.22 (1785192936)
- Red Hat — Red Hat OpenShift Container Platform 4.20 (1785288843)
- Red Hat — Red Hat OpenShift Container Platform 4.21 (1785301941)
- Red Hat — Red Hat OpenShift Container Platform 4.19 (1784913720)
- Red Hat — Red Hat OpenShift Container Platform 4.18 (1784912882)
- Red Hat — Red Hat OpenShift Container Platform 4.17 (1784914869)
- Red Hat — Red Hat OpenShift Container Platform 4.2 (1785288843)
- Red Hat — multicluster engine for Kubernetes 2.9.0 (1784905769)
- Red Hat — Red Hat OpenShift Container Platform 4.16 (1785534428)
- Red Hat — Red Hat OpenShift Container Platform 4.14 (1787001690)
- Red Hat — Red Hat OpenShift Container Platform 4.15 (1787055132)

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-16242)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2502690)
- [CNA](https://github.com/openshift/hypershift/pull/9031)
- [CNA](https://access.redhat.com/errata/RHSA-2026:46885)
- [CNA](https://access.redhat.com/errata/RHSA-2026:47388)
- [CNA](https://access.redhat.com/errata/RHSA-2026:47735)
- [CNA](https://access.redhat.com/errata/RHSA-2026:47953)
- [CNA](https://access.redhat.com/errata/RHSA-2026:47949)
- [CNA](https://access.redhat.com/errata/RHSA-2026:47974)
- [CNA](https://access.redhat.com/errata/RHSA-2026:48284)
- [CNA](https://access.redhat.com/errata/RHSA-2026:48693)
- [CNA](https://access.redhat.com/errata/RHSA-2026:48670)
- [CNA](https://access.redhat.com/errata/RHSA-2026:48676)
- [CNA](https://access.redhat.com/errata/RHSA-2026:48657)
- [CNA](https://access.redhat.com/errata/RHSA-2026:48699)
- [CNA](https://access.redhat.com/errata/RHSA-2026:47728)
- [CNA](https://access.redhat.com/errata/RHSA-2026:50758)
- [CNA](https://access.redhat.com/errata/RHSA-2026:56789)
- [CNA](https://access.redhat.com/errata/RHSA-2026:56912)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.80%
- **EPSS Percentile:** 54.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._