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CVE-2026-16242— Hypershift: konnectivity proxy-server accepts agent connections without validating client certificates

Quick assessment

Affected
Red Hat multicluster engine for Kubernetes 2.1
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenShift HyperShift是OpenShift公司的一款托管Kubernetes控制平面的云计算服务。 OpenShift HyperShift存在授权问题漏洞，该漏洞由于缺少认证导致客户端证书未被验证，远程攻击者可通过Konnectivity集群端点连接为未授权代理，加入路由池，从而可能代理、检查、修改或丢弃控制平面到节点的流量。

CVSS 9.4 · Critical EPSS 0.80% · P53

Affected Version Matrix 42

VendorProduct Version RangeStatus
Red Hat Logging Subsystem for Red Hat OpenShift any unaffected
Red Hat Multicluster Engine for Kubernetes any unaffected
any unaffected
any unaffected
any unaffected
Red Hat multicluster engine for Kubernetes 2.1 1784905766< * unaffected
1784905766< * unaffected
Red Hat multicluster engine for Kubernetes 2.11 1784945966< * unaffected
Red Hat multicluster engine for Kubernetes 2.17 1784856942< * unaffected
Red Hat multicluster engine for Kubernetes 2.6 1784905804< * unaffected
Red Hat multicluster engine for Kubernetes 2.8 1784905783< * unaffected
Red Hat multicluster engine for Kubernetes 2.9.0 1784905769< * unaffected
Red Hat OpenShift API for Data Protection any affected
any affected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 any unaffected
any unaffected
any unaffected
any unaffected
any unaffected
any unaffected
any unaffected
Red Hat Red Hat OpenShift Container Platform 4 any unaffected
any unaffected
any unaffected
any unaffected
any unaffected
any unaffected
any unaffected
any unaffected
… +6 more rows
Red Hat Red Hat OpenShift Container Platform 4.16 1785534428< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.17 1784914869< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.18 1784912882< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.19 1784913720< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.2 1785288843< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.21 1785301941< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.22 1785192936< * unaffected
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I. Basic Information for CVE-2026-16242

Vulnerability Information
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Vulnerability Title
Hypershift: konnectivity proxy-server accepts agent connections without validating client certificates
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
OpenShift HyperShift 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenShift HyperShift是OpenShift公司的一款托管Kubernetes控制平面的云计算服务。 OpenShift HyperShift存在授权问题漏洞，该漏洞由于缺少认证导致客户端证书未被验证，远程攻击者可通过Konnectivity集群端点连接为未授权代理，加入路由池，从而可能代理、检查、修改或丢弃控制平面到节点的流量。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat multicluster engine for Kubernetes 2.1 1784905766 ~ * cpe:/a:redhat:multicluster_engine:2.10::el9
Red Hat multicluster engine for Kubernetes 2.1 1784905766 ~ * cpe:/a:redhat:multicluster_engine:2.10::el9
Red Hat multicluster engine for Kubernetes 2.11 1784945966 ~ * cpe:/a:redhat:multicluster_engine:2.11::el9
Red Hat multicluster engine for Kubernetes 2.17 1784856942 ~ * cpe:/a:redhat:multicluster_engine:2.17::el9
Red Hat multicluster engine for Kubernetes 2.6 1784905804 ~ * cpe:/a:redhat:multicluster_engine:2.6::el9
Red Hat multicluster engine for Kubernetes 2.8 1784905783 ~ * cpe:/a:redhat:multicluster_engine:2.8::el9
Red Hat multicluster engine for Kubernetes 2.9.0 1784905769 ~ * cpe:/a:redhat:multicluster_engine:2.9::el9
Red Hat Red Hat OpenShift Container Platform 4.16 1785534428 ~ * cpe:/a:redhat:openshift:4.16::el9
Red Hat Red Hat OpenShift Container Platform 4.17 1784914869 ~ * cpe:/a:redhat:openshift:4.17::el9
Red Hat Red Hat OpenShift Container Platform 4.18 1784912882 ~ * cpe:/a:redhat:openshift:4.18::el9
Red Hat Red Hat OpenShift Container Platform 4.19 1784913720 ~ * cpe:/a:redhat:openshift:4.19::el9
Red Hat Red Hat OpenShift Container Platform 4.2 1785288843 ~ * cpe:/a:redhat:openshift:4.20::el9
Red Hat Red Hat OpenShift Container Platform 4.21 1785301941 ~ * cpe:/a:redhat:openshift:4.21::el9
Red Hat Red Hat OpenShift Container Platform 4.22 1785192936 ~ * cpe:/a:redhat:openshift:4.22::el9
Red Hat Logging Subsystem for Red Hat OpenShift - cpe:/a:redhat:logging:6
Red Hat Multicluster Engine for Kubernetes - cpe:/a:redhat:multicluster_engine
Red Hat Multicluster Engine for Kubernetes - cpe:/a:redhat:multicluster_engine
Red Hat Multicluster Engine for Kubernetes - cpe:/a:redhat:multicluster_engine
Red Hat Multicluster Engine for Kubernetes - cpe:/a:redhat:multicluster_engine
Red Hat OpenShift API for Data Protection - cpe:/a:redhat:openshift_api_data_protection:1
Red Hat OpenShift API for Data Protection - cpe:/a:redhat:openshift_api_data_protection:1
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-16242

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III. Intelligence Information for CVE-2026-16242

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Patches & Fixes for CVE-2026-16242 (1)

Vendor Advisories for CVE-2026-16242 (15)

Same Patch Batch · Red Hat · 2026-07-20 · 8 CVEs total

CVE-2026-12701 9.0 CRITICAL Pulpcore: pulpcore: relative_path_validator bypass via directory traversal in filesystemex
CVE-2026-64612 7.5 HIGH Libcupsfilters: cups-filters: libcupsfilters: cups image filter process abort via malforme
CVE-2026-12080 7.3 HIGH Qemu-kvm: qemu-guest-agent: local privilege escalation via symlink attack in guest-ssh-add
CVE-2026-15813 6.5 MEDIUM Kronosnet: kronosnet: memory corruption and out-of-bounds access via malformed network pac
CVE-2026-16277 6.5 MEDIUM Rpcbind: rpcbind: stack buffer overflow in rpcinfo rpcbaddrlist()
CVE-2026-15588 5.3 MEDIUM Gdbusserver: glib2: gdbusserver pre-authentication dos via unbounded sasl line buffering
CVE-2026-16254 4.3 MEDIUM Claircore: claircore: denial of service via out-of-bounds slice in claircore's apk install

IV. Related Vulnerabilities

Same product: multicluster engine for Kubernetes 2.1
Same vendor: Red Hat
Same weakness: CWE-306

V. Comments for CVE-2026-16242

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