Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-71577
Red Hat Multicluster Global Hub 1.4.9 — Multicluster-global-hub: multicluster-global-hub: spec-topic read acl leaks bootstrap kubeconfigs to all managed hubs during migration
AV AC PR UI S C I A CVSS EPSS %ile KEV
N H L N C H N N 6.3 .0042 34.3 —
AFFECTED
Product Versions Fixed
Multicluster Global Hub 1.4.9 unspecified 1788355417
Multicluster Global Hub 1.5.8 unspecified 1789478830
Multicluster Global Hub 1.6.6 unspecified 1790085268
Multicluster Global Hub 1.7.3 unspecified 1788372439
Multicluster Global Hub 1.8.2 unspecified 1788359461
Multicluster Global Hub 1.8.2 unspecified 1790638386
TIMELINE
Aug 7 Reserved by redhat
Aug 10 Published (CNA: redhat)
Sep 21 PATCH SHIPPED — CVE-2026-71577 (Red Hat Multicluster Global Hub 1.4.9). Fixed in Multicluster Global Hub 1.4.9 1788355417.
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| August 7, 2026 | Reserved | Reserved by redhat |
| August 10, 2026 | Published | Published (CNA: redhat) |
| September 21, 2026 | PATCH SHIPPED | PATCH SHIPPED — CVE-2026-71577 (Red Hat Multicluster Global Hub 1.4.9). Fixed in Multicluster Global Hub 1.4.9 1788355417. |
Affected
Affected products and packages — 6 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Multicluster Global Hub 1.4.9 | — | — | 1788355417 |
| Red Hat | Multicluster Global Hub 1.5.8 | — | — | 1789478830 |
| Red Hat | Multicluster Global Hub 1.6.6 | — | — | 1790085268 |
| Red Hat | Multicluster Global Hub 1.7.3 | — | — | 1788372439 |
| Red Hat | Multicluster Global Hub 1.8.2 | — | — | 1788359461 |
| Red Hat | Multicluster Global Hub 1.8.2 | — | — | 1790638386 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-71577 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
