CVE-2026-73267CWE-602

CVE-2026-73267

High · published August 21, 2026

CVSS v3.1
7.7
EPSS
1%
Percentile
49.4
In the wild
Unconfirmed
What it is

A flaw was found in the clusterclaims-controller component of multicluster engine (MCE). A tenant with standard permissions to create and delete ClusterClaim resources can exploit this by manipulating the `spec.namespace` field. This allows the tenant to specify and delete any ManagedCluster, including the hub's local-cluster or other tenants' clusters, due to a missing ownership check. This vulnerability can lead to a denial of service by enabling unauthorized deletion of ManagedClusters.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00626 · 49.4th percentile
Weakness
CWE-602 · Client-Side Enforcement of Server-Side Security
Published
2026-08-21T07:16Z
References (8)
https://access.redhat.com/errata/RHSA-2026:59556 · [email protected]https://access.redhat.com/errata/RHSA-2026:59557 · [email protected]https://access.redhat.com/errata/RHSA-2026:59558 · [email protected]https://access.redhat.com/errata/RHSA-2026:59559 · [email protected]https://access.redhat.com/errata/RHSA-2026:59579 · [email protected]https://access.redhat.com/errata/RHSA-2026:59593 · [email protected]https://access.redhat.com/security/cve/CVE-2026-73267 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2514218 · [email protected]
EPSS history
Timeline
  • 21 AUG 02:43Z
    Clusterclaims-controller: clusterclaims-controller: managedcluster deletion keyed solely on clusterclaim.spec.namespace with no ownership check
    cvelistv5