CVE-2026-71577 Information disclosure in Multicluster Global Hub 1.4.9
A compromised managed hub can intercept sensitive bootstrap kubeconfigs and long-lived API tokens from other hubs during migration, leading to unauthorized access.
- 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-2026-71577?
CVE-2026-71577 is a medium-severity vulnerability in Red Hat Multicluster Global Hub 1.4.9, published on 10 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 multicluster-global-hub. During a ManagedClusterMigration, the system incorrectly grants all managed hubs read access to a shared communication topic. This allows a compromised managed hub to intercept and collect sensitive bootstrap kubeconfigs, which contain API server tokens intended for other hubs. These tokens have an extended validity of approximately 9.86 years, significantly increasing the risk of unauthorized access and information disclosure to other managed clusters.
Weakness: CWE-522
Which versions are affected by CVE-2026-71577?
How do I fix CVE-2026-71577?
No fix has been published for CVE-2026-71577 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-71577 being exploited?
There is no known exploitation of CVE-2026-71577 in the wild and no public exploit code.
Sources
Also known as GHSA-v7q5-q7p3-9vjm.