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CVE-2026-16242

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

Published: Jul 20, 2026Updated: Aug 9, 2026 Sources: CVE List NVDCWE-306
9.4CRITICAL
NVD MITRE
EPSS Score
0.7%
Top 51.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:LAvailability
Low
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Weaknesses

CWE-306

Affected Products

Red Hat
commercial·US
multicluster engine for Kubernetes 2.1On-prem
Operating Systems / linux-distro
multicluster engine for Kubernetes 2.11.0On-prem
Operating Systems / linux-distro
multicluster engine for Kubernetes 2.17On-prem
Operating Systems / linux-distro
multicluster engine for Kubernetes 2.6On-prem
Cloud & SaaS / container-orchestration
multicluster engine for Kubernetes 2.8On-prem
Cloud & SaaS / container-orchestration
multicluster engine for Kubernetes 2.9.0On-prem
Operating Systems / linux-distro
Red Hat OpenShift Container Platform 4.17MixedSaaS Service
Cloud & SaaS / container-orchestration
Red Hat OpenShift Container Platform 4.18On-premSaaS Service
Cloud & SaaS / container-orchestration
and 9 more affected products View all →

Exploitability

Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://access.redhat.com/errata/RHSA-2026:46885
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:47388
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:47728
access.redhat.com
and 13 more references View all →

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