CVE-2026-66780 Submariner-operator: broker serviceaccount secret (token + ca) logged in full at trace verbosity
Excessive permissions in the submariner-operator allow compromised clusters to modify network configurations and intercept inter-cluster traffic.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-66780?
CVE-2026-66780 is a medium-severity missing authorization vulnerability in Red Hat Advanced Cluster Management for Kubernetes 2, published on 18 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in the submariner-operator component. The `submariner-k8s-broker-cluster` Role, which is assigned to joined clusters, possesses excessive permissions. This allows a compromised cluster to alter network configurations, specifically by overwriting other clusters' endpoint information. Consequently, an attacker can redirect inter-cluster tunnel traffic, enabling a Man-in-the-Middle (MITM) attack across the entire cluster mesh.
Weakness: CWE-532
Which versions are affected by CVE-2026-66780?
How do I fix CVE-2026-66780?
No fix has been published for CVE-2026-66780 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-2026-66780 being exploited?
There is no known exploitation of CVE-2026-66780 in the wild and no public exploit code.
Sources
Also known as GHSA-3xmh-phwc-5f4g.