6.3
Medium
CVE-2026-71577 A flaw was found in multicluster-global-hub
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Multicluster Global Hub | Versions not published | |
| Multicluster Global Hub 1.4.9 1788355417 | earliest → < 1788355417 | 1788355417 |
| Multicluster Global Hub 1.7.3 1788372439 | earliest → < 1788372439 | 1788372439 |
| Multicluster Global Hub 1.8.2 1790638386 | earliest → < 1790638386 | 1790638386 |
| Multicluster Global Hub 1.5.8 1789478830 | earliest → < 1789478830 | 1789478830 |
| Multicluster Global Hub 1.6.6 1790085268 | earliest → < 1790085268 | 1790085268 |
Other CVEs of Multicluster Global Hub
The 32 CVEs of Multicluster Global Hub →
CVE-2026-110744
A flaw was found in multicluster-global-hub-operator-bundle
7.2
High
CVE-2026-83550
A flaw was found in postgres-exporter
7.1
High
CVE-2026-66792
A flaw was found in the multicloud-operators-subscription component
9.9
Critical
CVE-2026-71576
A flaw was found in multicluster-global-hub
8.5
High