Privilege escalation in Red Hat Multicluster Engine For Kubernetes
CVE-2026-73269
A flaw was found in the cluster-curator-controller component. A local user, by creating a ClusterCurator resource with a specific naming convention, can trigger the creation of a cluster-scoped ClusterRoleBinding. This allows the user to escalate their privileges from namespace-local access to cluster-wide control. This privilege escalation grants broad permissions, including the ability to access and manipulate secrets, manage cluster actions, and delete hosted clusters or node pools.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.006 · change: +0.002
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-73269 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:59556 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:59593 (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-2026-73269?
- CVE-2026-73269 is a critical-severity vulnerability in Red Hat Multicluster Engine For Kubernetes, classified under Improper Privilege Management. CVSS score: 9.9/10. Published 2026-08-12.
- How severe is CVE-2026-73269?
- Critical severity. CVSS v3 base score is 9.9 out of 10.