{
  "threat_severity" : "Important",
  "public_date" : "2026-08-18T16:35:00Z",
  "bugzilla" : {
    "description" : "submariner-operator: Release workflow consumes same-org composite action via mutable @devel branch ref",
    "id" : "2507528",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2507528"
  },
  "cvss3" : {
    "cvss3_base_score" : "4.4",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N",
    "status" : "verified"
  },
  "cwe" : "CWE-1357",
  "details" : [ "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.", "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." ],
  "statement" : "This is an Important flaw in submariner-operator that allows a cluster administrator, or an attacker with equivalent privileges to patch the Submariner Custom Resource, to execute arbitrary privileged code across all cluster nodes, including control-plane nodes. This is due to a lack of image validation when overriding component images, enabling the deployment of malicious images with extensive privileges.",
  "affected_release" : [ {
    "product_name" : "Red Hat Advanced Cluster Management for Kubernetes 2.17",
    "release_date" : "2026-09-03T00:00:00Z",
    "advisory" : "RHSA-2026:63016",
    "cpe" : "cpe:/a:redhat:acm:2.17::el9",
    "package" : "rhacm2/subctl-rhel9:1788105072"
  }, {
    "product_name" : "Red Hat Advanced Cluster Management for Kubernetes 2.17",
    "release_date" : "2026-09-03T00:00:00Z",
    "advisory" : "RHSA-2026:63016",
    "cpe" : "cpe:/a:redhat:acm:2.17::el9",
    "package" : "rhacm2/submariner-rhel9-operator:1788073481"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Advanced Cluster Management for Kubernetes 2",
    "fix_state" : "Affected",
    "package_name" : "rhacm2/submariner-addon-rhel9",
    "cpe" : "cpe:/a:redhat:acm:2"
  }, {
    "product_name" : "Red Hat Advanced Cluster Management for Kubernetes 2",
    "fix_state" : "Affected",
    "package_name" : "rhacm2/submariner-operator-bundle",
    "cpe" : "cpe:/a:redhat:acm:2"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-66783\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-66783" ],
  "name" : "CVE-2026-66783",
  "mitigation" : {
    "value" : "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.",
    "lang" : "en:us"
  },
  "csaw" : false
}