CVE-2026-71577
Multicluster-global-hub: multicluster-global-hub: spec-topic read acl leaks bootstrap kubeconfigs to all managed hubs during migration
- State
- Published
- Severity
- 6.3 Medium
- Published
- Aug 10, 2026
- Updated
- Sep 29, 2026
- Reserved
- Aug 7, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.3 Medium | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N | redhat |
Weaknesses
- CWE-522 Insufficiently Protected Credentials
Affected Products
| Product | Versions |
|---|---|
Multicluster Global Hub 1.4.9Red Hat |
|
Multicluster Global Hub 1.5.8Red Hat |
|
Multicluster Global Hub 1.6.6Red Hat |
|
Multicluster Global Hub 1.7.3Red Hat |
|
Multicluster Global Hub 1.8.2Red Hat |
|
Multicluster Global Hub 1.8.2Red Hat |
|
References
- RHSA-2026:67516vendor-advisory
- RHSA-2026:67842vendor-advisory
- RHSA-2026:68515vendor-advisory
- RHSA-2026:71597vendor-advisory
- RHSA-2026:73038vendor-advisory
- RHSA-2026:73419vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-71577vdb-entry
- RHBZ#2512514issue-tracking
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