Vulnerability in Red Hat Multicluster Global Hub
CVE-2026-71577
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (28.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-71577 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:67516 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:67842 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:68515 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:71597 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-71577?
- CVE-2026-71577 is a medium-severity vulnerability in Red Hat Multicluster Global Hub, classified under Insufficiently Protected Credentials. CVSS score: 6.3/10. Published 2026-08-10.
- How severe is CVE-2026-71577?
- Medium severity. CVSS v3 base score is 6.3 out of 10.