CVE-2026-73267Clusterclaims-controller: managedcluster deletion keyed solely on clusterclaim.spec.namespace with no local ownership check
- 7.7HighCVSS base score
- 0.63%Exploitation in 30 daysEPSS · top 49% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By redhat
- 10 days later
· 10 days later
Published
- 39 days later
· 39 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | High7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | High7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.63% · top 49% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.7.
Affected products
Red Hat · multicluster engine for Kubernetes 2.10
- unaffected 1787196014 – < *
Red Hat · multicluster engine for Kubernetes 2.11
- unaffected 1787239442 – < *
Red Hat · multicluster engine for Kubernetes 2.17
- unaffected 1786577950 – < *
Red Hat · multicluster engine for Kubernetes 2.6
- unaffected 1787259112 – < *
Red Hat · multicluster engine for Kubernetes 2.8
- unaffected 1787259059 – < *
Red Hat · multicluster engine for Kubernetes 2.9
- unaffected 1787195995 – < *
What to do
Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
References
References8
- RHSA-2026:59556 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:59557 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:59558 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:59559 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:59579 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:59593 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-73267 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2514218 (opens in a new tab)issue-trackingx_refsource_REDHAT
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-63800 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-73267)Record last updated .