CVE record · CVE-2026-73266

Clusterclaims-controller: confused deputy: tenant-controlled clusterclaim labels propagated to managedcluster, enabling cross-tenant managedclusterset join

CVSS 7.1 HighEPSS 0.0035 · 28th percentile

Published by the CVE Program (CNA: redhat) at 13 Aug 2026, 16:36 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Red Hat	multicluster engine for Kubernetes 2.10 Package name: multicluster-engine/clusterclaims-controller-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1787196014 to before * rpm Other versions: affected
Red Hat	multicluster engine for Kubernetes 2.11 Package name: multicluster-engine/clusterclaims-controller-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1787239442 to before * rpm Other versions: affected
Red Hat	multicluster engine for Kubernetes 2.17 Package name: multicluster-engine/clusterclaims-controller-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1786577950 to before * rpm Other versions: affected
Red Hat	multicluster engine for Kubernetes 2.6 Package name: multicluster-engine/clusterclaims-controller-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1787259112 to before * rpm Other versions: affected
Red Hat	multicluster engine for Kubernetes 2.8 Package name: multicluster-engine/clusterclaims-controller-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1787259059 to before * rpm Other versions: affected
Red Hat	multicluster engine for Kubernetes 2.9 Package name: multicluster-engine/clusterclaims-controller-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1787195995 to before * rpm Other versions: affected

Identifiers: CVE-2026-73266
CNA: redhat
Weakness (CWE): CWE-441
Tags: Red Hat multicluster engine for Kubernetes 2.10
Red Hat multicluster engine for Kubernetes 2.11
Red Hat multicluster engine for Kubernetes 2.17
Red Hat multicluster engine for Kubernetes 2.6
Red Hat multicluster engine for Kubernetes 2.8
Red Hat multicluster engine for Kubernetes 2.9
CWE-441
Published: 13 Aug 2026
Updated: 29 Sept 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.1	High	3.1	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N	CNA (redhat)

CISA KEV Not listed.
EPSS 0.0035, the 28th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 13 Aug 2026. New records show when each source confirmed them.

Sources

References from the CNA

access.redhat.com/errata/RHSA-2026:59556 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:59557 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:59558 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:59559 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:59579 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:59593 vendor-advisoryredhat
access.redhat.com/security/cve/CVE-2026-73266 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2514217 issue-trackingredhat

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.