Privilege escalation in Red Hat Multicluster Engine For Kubernetes
CVE-2026-10059
A flaw was found in the Multicluster Engine for Kubernetes ClusterCurator controller. A tenant administrator with namespace-scoped privileges can exploit this vulnerability by creating a namespaced ClusterCurator. This action inadvertently grants the tenant administrator the ability to mint a token for a ServiceAccount with cluster-wide administrative authority. This leads to a privilege escalation, allowing the tenant administrator to gain full control over the cluster.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (50.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-10059 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:59556 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:59557 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:59558 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:59559 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:59579 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-10059?
- CVE-2026-10059 is a critical-severity vulnerability in Red Hat Multicluster Engine For Kubernetes, classified under Incorrect Privilege Assignment. CVSS score: 9.1/10. Published 2026-08-05.
- How severe is CVE-2026-10059?
- Critical severity. CVSS v3 base score is 9.1 out of 10.