CVE-2026-16242

CRITICAL

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

Title source: cna

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.

References (10)

Core 10

Core References

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:47388

https://access.redhat.com/errata/RHSA-2026:47388

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:47735

https://access.redhat.com/errata/RHSA-2026:47735

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:47949

https://access.redhat.com/errata/RHSA-2026:47949

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:47953

https://access.redhat.com/errata/RHSA-2026:47953

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:47974

https://access.redhat.com/errata/RHSA-2026:47974

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:48284

https://access.redhat.com/errata/RHSA-2026:48284

Vdb Entry, X_Refsource_Redhat vdb-entry x_refsource_redhat

https://access.redhat.com/security/cve/CVE-2026-16242

Issue Tracking, X_Refsource_Redhat issue-tracking x_refsource_redhat

RHBZ#2502690

https://bugzilla.redhat.com/show_bug.cgi?id=2502690

https://github.com/openshift/hypershift/pull/9031

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:46885

https://access.redhat.com/errata/RHSA-2026:46885

Scores

CVSS v3 9.4

EPSS 0.0061

EPSS Percentile 45.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

CWE

CWE-306

Status published

Products (11)

Red Hat/Logging Subsystem for Red Hat OpenShift

Red Hat/Multicluster Engine for Kubernetes

Red Hat/multicluster engine for Kubernetes 2.10 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 API for Data Protection

Red Hat/Red Hat Advanced Cluster Management for Kubernetes 2

... and 1 more

Published Jul 20, 2026

Tracked Since Jul 20, 2026