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CVE-2026-73267

7.7 · HIGH

A flaw was found in the clusterclaims-controller component of multicluster engine (MCE).

Published Aug 21, 2026CWE-602EPSS 0.63%

Overview

CVE-2026-73267 is a high-severity vulnerability. It was published on August 21, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refaccess.redhat.com/errata/RHSA-2026:59556Refaccess.redhat.com/errata/RHSA-2026:59557Refaccess.redhat.com/errata/RHSA-2026:59558Refaccess.redhat.com/errata/RHSA-2026:59559Refaccess.redhat.com/errata/RHSA-2026:59579Refaccess.redhat.com/errata/RHSA-2026:59593Refaccess.redhat.com/security/cve/CVE-2026-73267Refbugzilla.redhat.com/show_bug.cgi?id=2514218

How CyberStrike helps

Frequently asked questions

What is CVE-2026-73267?

CVE-2026-73267 is a high-severity vulnerability. It was published on August 21, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

How severe is CVE-2026-73267?

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-73267?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-73267?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-73267 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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