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CRITICAL

CVE-2026-10059

CVSS v3

9.1

CRITICAL

EPSS Score

0.6 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2026-10059 Red Hat Product Security20 products fixed

    cluster-curator-controller: cluster-curator-controller: namespace admin can escalate to cluster-wide curator authority via ClusterCurator ServiceAccount token

  • RHSA-2026:59579 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: multicluster engine for Kubernetes v2.6.14 security update

  • RHSA-2026:59559 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: multicluster engine for Kubernetes v2.9.7 security update

  • RHSA-2026:59558 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: multicluster engine for Kubernetes v2.8.10 security update

  • RHSA-2026:59557 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: multicluster engine for Kubernetes v2.10.6 security update

  • RHSA-2026:59556 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: multicluster engine for Kubernetes v2.11.6 security update

Full record on NVD

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.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Published
2026-08-05
Last Modified
2026-08-06

Frequently asked questions

What is CVE-2026-10059?

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.

Is CVE-2026-10059 actively exploited?

Active exploitation of CVE-2026-10059 has not been confirmed. Its EPSS score was 0.6% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-10059?

CVE-2026-10059 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

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