# CVE-2026-66783

## Summary

- **CVE ID:** CVE-2026-66783
- **Severity:** MEDIUM
- **CVSS Score:** 4.4 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N)
- **CWE:** CWE-20, CWE-1357
- **Published:** Aug 18, 2026
- **Last Modified:** Sep 3, 2026

## Description

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 Products

- Red Hat — Red Hat Advanced Cluster Management for Kubernetes 2.17 (1788105072)
- Red Hat — Red Hat Advanced Cluster Management for Kubernetes 2.17 (1788073481)

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-66783)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2507528)
- [CNA](https://access.redhat.com/errata/RHSA-2026:63016)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.28%
- **EPSS Percentile:** 20.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._