Critical severity · published Jul 20, 2026
CVE-2026-16242
Hypershift: konnectivity proxy-server accepts agent connections without validating client certificates
9.4
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 60% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat OpenShift Container Platform 4.14 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.15 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.16 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.17 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.18 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.19 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.20 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.21 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.22 · Red Hat
All versions, or not specified · source: vendor
ME
multicluster engine for Kubernetes 2.1 · Red Hat
All versions, or not specified · source: vendor
ME
multicluster engine for Kubernetes 2.11 · Red Hat
All versions, or not specified · source: vendor
ME
multicluster engine for Kubernetes 2.17 · Red Hat
All versions, or not specified · source: vendor
Affected product
ME
multicluster engine for Kubernetes 2.1
Red Hat
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