CVE-2026-66783

Summary

A flaw was found in the submariner-operator component of Red Hat Advanced Cluster Management for Kubernetes. This vulnerability allows a cluster administrator, or any user with permissions to modify the Submariner Custom Resource (CR), to specify an unvalidated image path. This lack of validation enables an attacker to execute arbitrary code with elevated privileges across the entire cluster, including control-plane nodes, by deploying a malicious image.

Affected Software

VendorProductVersion RangeStatus
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.171788105072 < *unaffected
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.171788073481 < *unaffected

Weaknesses

  • CWE-1357: Reliance on Insufficiently Trustworthy Component

Workarounds

To mitigate this issue, restrict access to cluster-admin roles and carefully control permissions for users or service accounts that can modify Submariner Custom Resources. Ensure that only trusted and authorized personnel have the ability to patch Submariner CRs, thereby preventing the injection of malicious images.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References