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CRITICAL

CVE-2026-73268

CVSS v3

9.9

CRITICAL

EPSS Score

0.9 %

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-2026-73268 Red Hat Product Security24 products fixed

    cluster-curator-controller: cluster-curator-controller: spec.install.overrideJob allows arbitrary Job spec injection

  • RHSA-2026:59593 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: multicluster engine for Kubernetes v2.17.2 security update

  • 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

1 more advisory

Full record on NVD

Description

A flaw was found in the cluster-curator-controller component of multicluster engine (MCE). A tenant with create or update permissions on ClusterCurator resources can inject an arbitrary Job specification. This is possible because the CreateJob() function does not validate user-controlled input when unmarshaling the spec.install.overrideJob raw extension. Successful exploitation allows the injected Job to run with the controller's elevated privileges, leading to arbitrary code execution and privilege escalation, potentially accessing cluster-wide secrets.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
2026-08-12
Last Modified
2026-08-12

Frequently asked questions

What is CVE-2026-73268?

A flaw was found in the cluster-curator-controller component of multicluster engine (MCE). A tenant with create or update permissions on ClusterCurator resources can inject an arbitrary Job specification. This is possible because the CreateJob() function does not validate user-controlled input when unmarshaling the spec.install.overrideJob raw extension. Successful exploitation allows the injected Job to run with the controller's elevated privileges, leading to arbitrary code execution and privilege escalation, potentially accessing cluster-wide secrets.

Is CVE-2026-73268 actively exploited?

Active exploitation of CVE-2026-73268 has not been confirmed. Its EPSS score was 0.9% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-73268?

CVE-2026-73268 has a CVSS v3 base score of 9.9 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

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