Vulnerability in Red Hat Multicluster Global Hub
CVE-2026-71576
A flaw was found in multicluster-global-hub. The manager component improperly validates the source identity of incoming CloudEvents on Kafka status topics. A remote attacker, after compromising a managed hub and obtaining its Kafka client certificate, can manipulate the self-asserted source identity. This allows the attacker to falsify or delete critical data, such as compliance, inventory, and cluster health information, belonging to other hubs in the database.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L.
EPSS exploit prediction
EPSS: 0.002 (10.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 10.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-71576 (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-2026-71576?
- CVE-2026-71576 is a high-severity vulnerability in Red Hat Multicluster Global Hub, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.5/10. Published 2026-08-10.
- How severe is CVE-2026-71576?
- High severity. CVSS v3 base score is 8.5 out of 10.