Cluster-curator-controller: cluster-curator-controller: spec.install.overridejob allows arbitrary job spec injection
Priority MEDIUM 44CWE-94Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-94.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00875 59th percentileScored 2026-11-07
Fix Fixed Red Hat: 6 advisories
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | multicluster engine for Kubernetes 2.10 | — | 1787201612 | Patch available | CNA |
| Red Hat | multicluster engine for Kubernetes 2.11 | — | 1787238383 | Patch available | CNA |
| Red Hat | multicluster engine for Kubernetes 2.17 | — | 1786750700 | Patch available | CNA |
| Red Hat | multicluster engine for Kubernetes 2.6 | — | 1787264185 | Patch available | CNA |
| Red Hat | multicluster engine for Kubernetes 2.8 | — | 1787259011 | Patch available | CNA |
| Red Hat | multicluster engine for Kubernetes 2.9 | — | 1787201646 | Patch available | CNA |
- multicluster engine for Kubernetes 2.10 VendorRed Hat Affected — Fixed in 1787201612 Patch available CNA
- multicluster engine for Kubernetes 2.11 VendorRed Hat Affected — Fixed in 1787238383 Patch available CNA
- multicluster engine for Kubernetes 2.17 VendorRed Hat Affected — Fixed in 1786750700 Patch available CNA
- multicluster engine for Kubernetes 2.6 VendorRed Hat Affected — Fixed in 1787264185 Patch available CNA
- multicluster engine for Kubernetes 2.8 VendorRed Hat Affected — Fixed in 1787259011 Patch available CNA
- multicluster engine for Kubernetes 2.9 VendorRed Hat Affected — Fixed in 1787201646 Patch available CNA
CPE names CNA · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/a:redhat:multicluster_engine:2.10::el9 | 2.10 | — | Red Hat |
| cpe:/a:redhat:multicluster_engine:2.11::el9 | 2.11 | — | Red Hat |
| cpe:/a:redhat:multicluster_engine:2.17::el9 | 2.17 | — | Red Hat |
| cpe:/a:redhat:multicluster_engine:2.6::el9 | 2.6 | — | Red Hat |
| cpe:/a:redhat:multicluster_engine:2.8::el9 | 2.8 | — | Red Hat |
| cpe:/a:redhat:multicluster_engine:2.9::el9 | 2.9 | — | Red Hat |
- cpe:/a:redhat:multicluster_engine:2.10::el9 Versions 2.10 — ·Red Hat
- cpe:/a:redhat:multicluster_engine:2.11::el9 Versions 2.11 — ·Red Hat
- cpe:/a:redhat:multicluster_engine:2.17::el9 Versions 2.17 — ·Red Hat
- cpe:/a:redhat:multicluster_engine:2.6::el9 Versions 2.6 — ·Red Hat
- cpe:/a:redhat:multicluster_engine:2.8::el9 Versions 2.8 — ·Red Hat
- cpe:/a:redhat:multicluster_engine:2.9::el9 Versions 2.9 — ·Red Hat
Remediation
Red Hat 6 advisories
- RHSA-2026:59593 Released 2026-08-25 · Red Hat rating Importantmulticluster engine for Kubernetes v2.17.2 security update
- multicluster engine for Kubernetes 2.17 registry.redhat.io/multicluster-engine/cluster-api-provider-kubevirt-rhel9, registry.redhat.io/multicluster-engine/cluster-curator-controller-rhel9, registry.redhat.io/multicluster-engine/cluster-image-set-controller-rhel9 +6
- RHSA-2026:59579 Released 2026-08-25 · Red Hat rating Importantmulticluster engine for Kubernetes v2.6.14 security update
- multicluster engine for Kubernetes 2.6 registry.redhat.io/multicluster-engine/addon-manager-rhel9, registry.redhat.io/multicluster-engine/cluster-curator-controller-rhel9, registry.redhat.io/multicluster-engine/cluster-image-set-controller-rhel9 +17
- RHSA-2026:59559 Released 2026-08-25 · Red Hat rating Importantmulticluster engine for Kubernetes v2.9.7 security update
- multicluster engine for Kubernetes 2.9 registry.redhat.io/multicluster-engine/addon-manager-rhel9, registry.redhat.io/multicluster-engine/cluster-curator-controller-rhel9, registry.redhat.io/multicluster-engine/cluster-image-set-controller-rhel9 +15
Show 3 more Red Hat advisories
- RHSA-2026:59558 Released 2026-08-25 · Red Hat rating Importantmulticluster engine for Kubernetes v2.8.10 security update
- multicluster engine for Kubernetes 2.8 registry.redhat.io/multicluster-engine/addon-manager-rhel9, registry.redhat.io/multicluster-engine/backplane-rhel9-operator, registry.redhat.io/multicluster-engine/cluster-api-provider-agent-rhel9 +20
- RHSA-2026:59557 Released 2026-08-25 · Red Hat rating Importantmulticluster engine for Kubernetes v2.10.6 security update
- multicluster engine for Kubernetes 2.10 registry.redhat.io/multicluster-engine/addon-manager-rhel9, registry.redhat.io/multicluster-engine/cluster-curator-controller-rhel9, registry.redhat.io/multicluster-engine/cluster-image-set-controller-rhel9 +16
- RHSA-2026:59556 Released 2026-08-25 · Red Hat rating Importantmulticluster engine for Kubernetes v2.11.6 security update
- multicluster engine for Kubernetes 2.11 registry.redhat.io/multicluster-engine/addon-manager-rhel9, registry.redhat.io/multicluster-engine/cluster-curator-controller-rhel9, registry.redhat.io/multicluster-engine/cluster-image-set-controller-rhel9 +14
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| multicluster engine for Kubernetes 2.10 | Fixed | RHSA-2026:59557 |
| multicluster engine for Kubernetes 2.11 | Fixed | RHSA-2026:59556 |
| multicluster engine for Kubernetes 2.17 | Fixed | RHSA-2026:59593 |
| multicluster engine for Kubernetes 2.6 | Fixed | RHSA-2026:59579 |
| multicluster engine for Kubernetes 2.8 | Fixed | RHSA-2026:59558 |
| multicluster engine for Kubernetes 2.9 | Fixed | RHSA-2026:59559 |
Not affected: 6 products
- multicluster engine for Kubernetes 2.10
- multicluster engine for Kubernetes 2.11
- multicluster engine for Kubernetes 2.17
- multicluster engine for Kubernetes 2.6
- multicluster engine for Kubernetes 2.8
- multicluster engine for Kubernetes 2.9
Timeline
- 2026-10-02 Threatist record created from CVE-2026-73268
- 2026-10-03 Alias added: GHSA-6c6p-j4gf-mj2c
References
More Red Hat vulnerabilities
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- TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-73268 · CVE Program
- CVE-2026-73268 · NVD
- FIRST EPSS
- GHSA-6c6p-j4gf-mj2c · GitHub Advisory Database · CC BY 4.0
- CVE-2026-73268 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences