CVE-2026-71577Multicluster-global-hub: multicluster-global-hub: spec-topic read acl leaks bootstrap kubeconfigs to all managed hubs during migration
Updated under an hour ago ()
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It affects Red Hat Multicluster Global Hub 1.4.9. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
- Weakness (CWE)
- CWE-522
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 29, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Multicluster Global Hub 1.4.9 redhat:multicluster_globalhub | from 1788355417 not affected | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:67516vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:67842vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:68515vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:71597vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:73038vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:73419vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-71577vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2512514issue-tracking, x-refsource-redhat
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.