{"id":"CVE-2026-66783","title":"Submariner-operator: release workflow consumes same-org composite action via mutable @devel branch ref","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),…","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N","cvssSource":"cna","cwe":["CWE-1357"],"vendor":"Red Hat","product":"rhacm2/subctl-rhel9","affected":["rhacm2/subctl-rhel9 (all versions)","rhacm2/submariner-rhel9-operator (all versions)","rhacm2/subctl-rhel9 (all versions)","rhacm2/submariner-rhel9-operator (all versions)","rhacm2/submariner-addon-rhel9 (all versions)","rhacm2/submariner-operator-bundle (all versions)"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-08-19T15:04:32.835125Z"},"published":"2026-08-18","updated":"2026-10-19","sourceUpdated":"2026-10-19T17:02:18.781Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-66783","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:63016","label":"RHSA-2026:63016"},{"url":"https://access.redhat.com/errata/RHSA-2026:85227","label":"RHSA-2026:85227"},{"url":"https://access.redhat.com/security/cve/CVE-2026-66783"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2507528","label":"RHBZ#2507528"}],"tags":["cve.org"],"epss":0.00351,"epssPercentile":0.27261,"ingestedAt":"2026-10-19T17:33:42.453Z","slug":"CVE-2026-66783","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `rhacm2/subctl-rhel9 (all versions)`\n- `rhacm2/submariner-rhel9-operator (all versions)`\n- `rhacm2/subctl-rhel9 (all versions)`\n- `rhacm2/submariner-rhel9-operator (all versions)`\n- `rhacm2/submariner-addon-rhel9 (all versions)`\n- `rhacm2/submariner-operator-bundle (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nTo 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.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}