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VulnerabilityPublished Updated

CVE-2026-10059: Red Hat multicluster engine for Kubernetes 2.1 · Incorrect Privilege Assignment

Affects Red Hat multicluster engine for Kubernetes 2.1Source CVE Database V5

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Not known to be exploited · CVSS 9.1 Critical.

Data as of 3 Nov 2026, 22:58 UTC

CVSS 3.1 base score
9.1Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 50% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hatmulticluster engine for Kubernetes 2.1Affected–Fixed in–
Red Hatmulticluster engine for Kubernetes 2.11Affected–Fixed in–
Red Hatmulticluster engine for Kubernetes 2.6Affected–Fixed in–
Red Hatmulticluster engine for Kubernetes 2.8Affected–Fixed in–
Red Hatmulticluster engine for Kubernetes 2.9Affected–Fixed in–

AI-suggested

Red Hat currently states that no mitigation or patch is available that meets their criteria for ease of use, applicability, and stability. Users should monitor the Red Hat advisory for updates. Customers with a Technical Account Manager (TAM) may consult directly for guidance. Until a fix or mitigation is provided, restricting tenant administrator privileges and limiting access to the ClusterCurator resource may reduce exposure, but no official workaround is confirmed.

Description

A flaw was found in the Multicluster Engine for Kubernetes ClusterCurator controller. A tenant administrator with namespace-scoped privileges can exploit this vulnerability by creating a namespaced ClusterCurator. This action inadvertently grants the tenant administrator the ability to mint a token for a ServiceAccount with cluster-wide administrative authority. This leads to a privilege escalation, allowing the tenant administrator to gain full control over the cluster.

References

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