CVE-2026-16242
Critical
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.
SeverityCritical
CVSS9.4
Exploit probability—
ProductMulticluster Engine 2.10
PublishedJul 20, 2026
First seenJul 20, 2026
Weakness typeCWE-306Missing authentication for critical function
How to fix
Vendor advisories
- access.redhat.com/errata/RHSA-2026:46885
- access.redhat.com/errata/RHSA-2026:47388
- access.redhat.com/errata/RHSA-2026:47728
- access.redhat.com/errata/RHSA-2026:47735
- access.redhat.com/errata/RHSA-2026:47949
- access.redhat.com/errata/RHSA-2026:47953
- access.redhat.com/errata/RHSA-2026:47974
- access.redhat.com/errata/RHSA-2026:48284
- access.redhat.com/errata/RHSA-2026:48657
- access.redhat.com/errata/RHSA-2026:48670
- access.redhat.com/errata/RHSA-2026:48676
- access.redhat.com/errata/RHSA-2026:48693
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| multicluster_engine 2.10 | No range specified | — |
| multicluster_engine 2.11 | No range specified | — |
| multicluster_engine 2.17 | No range specified | — |
| multicluster_engine 2.6 | No range specified | — |
| multicluster_engine 2.8 | No range specified | — |
| multicluster_engine 2.9 | No range specified | — |
| openshift 4.14 | No range specified | — |
| openshift 4.15 | No range specified | — |
| openshift 4.16 | No range specified | — |
| openshift 4.17 | No range specified | — |
| openshift 4.18 | No range specified | — |
| openshift 4.19 | No range specified | — |
| openshift 4.20 | No range specified | — |
| openshift 4.21 | No range specified | — |
| openshift 4.22 | No range specified | — |
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