CVE-2026-16242 Hypershift: konnectivity proxy-server accepts agent connections without validating client certificates
Remote attackers can connect as unauthenticated agents to proxy or modify control-plane traffic due to missing certificate validation in Konnectivity.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16242?
CVE-2026-16242 is a critical missing authorization vulnerability in Logging Subsystem for Red Hat OpenShift, published on 20 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-306
Which versions are affected by CVE-2026-16242?
How do I fix CVE-2026-16242?
No fix has been published for CVE-2026-16242 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-16242 being exploited?
There is no known exploitation of CVE-2026-16242 in the wild and no public exploit code.
Sources
Also known as GHSA-43hh-68v6-mf36.