CVE-2026-16242
Hypershift: konnectivity proxy-server accepts agent connections without validating client certificates
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Hypershift: konnectivity proxy-server accepts agent connections without validating client certificates
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.
- Record
CVE-2026-16242- CVSS 3.1
- 9.4 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L - Weakness
- CWE-306
- Updated
- 2026-11-02
EUVDEUVD-2026-45897
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.
- Record
EUVD-2026-45897- CVSS 3.1
- 9.4 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-43hh-68v6-mf36
A flaw was found in the Konnectivity proxy-server configuration for hosted control planes. The...
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.
- Record
GHSA-43hh-68v6-mf36- CVSS 3.1
- 9.4 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L - Weakness
- CWE-306
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-16242- CVSS 3.1
- 9.4 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L - Weakness
- CWE-306
- Updated
- 2026-11-02
Affected products
- red hat logging subsystem for red hat openshift
- red hat multicluster engine for kubernetes
- red hat multicluster engine for kubernetes 2.1
- red hat multicluster engine for kubernetes 2.11
- red hat multicluster engine for kubernetes 2.17
- red hat multicluster engine for kubernetes 2.6
- red hat multicluster engine for kubernetes 2.8
- red hat multicluster engine for kubernetes 2.9
- red hat openshift api for data protection
- red hat advanced cluster management for kubernetes 2
- red hat openshift container platform 4
- red hat openshift container platform 4.14
Show 8 moreShow less
- red hat openshift container platform 4.15
- red hat openshift container platform 4.16
- red hat openshift container platform 4.17
- red hat openshift container platform 4.18
- red hat openshift container platform 4.19
- red hat openshift container platform 4.20
- red hat openshift container platform 4.21
- red hat openshift container platform 4.22
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-16242 is a critical vulnerability (CVSS 9.4) in Red Hat Logging Subsystem For Red Hat Openshift, published July 20, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.92%, the 60th percentile. No source names a fixed version.
References
access.redhat.com/errata/RHSA-2026:46885
Show 15 moreShow less
bugzilla.redhat.com/show_bug.cgi?id=2502690
github.com/openshift/hypershift/pull/9031
nvd.nist.gov/vuln/detail/CVE-2026-16242