CVE-2026-66783
Unvalidated image path in submariner-operator enables cluster-wide arbitrary code execution.
Is CVE-2026-66783 being exploited?
Not confirmed. CVE-2026-66783 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.28% probability of exploitation in the next 30 days.
How severe is CVE-2026-66783?
CVE-2026-66783 is rated High with a CVSS score of 8.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-66783?
Yes. A fix has been recorded for CVE-2026-66783. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-66783 affect?
CVE-2026-66783 affects Red Hat Advanced Cluster Management (submariner-operator), Kubernetes clusters using Submariner CR, OpenShift clusters running ACM/submariner. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-66783?
Restrict Submariner CR modify rights, block untrusted images, and apply vendor patch when available.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
User with Submariner CR modify rights can deploy a malicious image to execute code with elevated privileges across the cluster, including control-plane nodes.
Immediate action required