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Vulnerability record · CVE-2026-73268 · published 12 August 2026

CVE-2026-73268: Code injection vulnerability

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.

9.9 CVSS 3.1 Critical EPSS 0.88% · top 42.6% CWE-94 · Code injection Awaiting Analysis
9.9CVSS 3.1 base score
0.88%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
8References
8 Sep 2026Last modified by 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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:59556
https://access.redhat.com/errata/RHSA-2026:59557
https://access.redhat.com/errata/RHSA-2026:59558
https://access.redhat.com/errata/RHSA-2026:59559
https://access.redhat.com/errata/RHSA-2026:59579
https://access.redhat.com/errata/RHSA-2026:59593
https://access.redhat.com/security/cve/CVE-2026-73268
https://bugzilla.redhat.com/show_bug.cgi?id=2514219

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Source: NIST National Vulnerability Database (record CVE-2026-73268), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.