CVE-2026-71577

medium Red Hat
CVSS v3 Base Score
6.3
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
None
Availability
None
Published: August 10, 2026 (27 days ago)
Last Modified: August 10, 2026
Vendor: Red Hat
Source: REDHAT

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.

CWE

CWE-522

Affected Products

Multicluster Global Hub

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov