CVE-2026-71577
MEDIUM
MEDIUM
Priority: 0.03
BB Relevance:
53/100
Published: 2026-08-10
Modified: 2026-10-24
First seen: 2026-10-29
Status: active
Attack Surface
Network
No Interaction
Conf. Impact
Scope Change
CVSS Vector Breakdown
AV:
Network
AC:
High
PR:
Low
UI:
None
S:
Changed
C:
High
I:
None
A:
None
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.