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
Not known to be exploited · CVSS 9.1 Critical.
Data as of 3 Nov 2026, 22:58 UTC
- 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:HExploitation evidence
Disclosed: evidence found.
CVE published 5 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| Red Hatmulticluster engine for Kubernetes 2.1 | Affected– | Fixed in– |
| Red Hatmulticluster engine for Kubernetes 2.11 | Affected– | Fixed in– |
| Red Hatmulticluster engine for Kubernetes 2.6 | Affected– | Fixed in– |
| Red Hatmulticluster engine for Kubernetes 2.8 | Affected– | Fixed in– |
| Red Hatmulticluster engine for Kubernetes 2.9 | Affected– | 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
- access.redhat.com/security/cve/CVE-2026-10059 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2483187 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:59556 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:59557 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:59558 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:59559 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:59579 (opens in a new tab)