CVE-2026-16242 (GCVE-0-2026-16242)
Vulnerability from cvelistv5 – Published: 2026-07-20 07:33 – Updated: 2026-07-21 14:59
VLAI
EPSS
VEX
Title
Hypershift: konnectivity proxy-server accepts agent connections without validating client certificates
Summary
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.
Severity
9.4 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-16242 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2502690 | issue-trackingx_refsource_REDHAT |
| https://github.com/openshift/hypershift/pull/9031 |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| 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 | 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 OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4 |
Date Public
2026-07-17 00:00
Credits
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"redhat_vex": {
"aggregate_severity": "Critical",
"current_release_date": "2026-07-20T16:46:29+00:00",
"cve": "CVE-2026-16242",
"id": "CVE-2026-16242",
"initial_release_date": "2026-07-17T00:00:00+00:00",
"product_status:known_affected": "6",
"product_status:known_not_affected": "24",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "hypershift: Konnectivity proxy-server accepts agent connections without validating client certificates",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-16242.json",
"version": "3"
},
"vulnrichment": {
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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