{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-66793", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-07-27T17:51:24.886Z", "datePublished": "2026-08-18T15:02:31.273Z", "dateUpdated": "2026-08-27T02:15:52.406Z" }, "containers": { "cna": { "title": "Governance-policy-addon-controller: governance-policy-addon-controller: arbitrary container image override via managedclusteraddon annotation enables rce on spoke", "metrics": [ { "other": { "content": { "value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "format": "CVSS" } ], "descriptions": [ { "lang": "en", "value": "A flaw was found in the governance-policy-addon-controller component of Red Hat Advanced Cluster Management for Kubernetes. A user with permissions to annotate the namespaced ManagedClusterAddOn resource can override the governance-policy container image. This allows an attacker to run a controlled image with cluster-admin privileges on the managed cluster, leading to arbitrary code execution and privilege escalation." } ], "affected": [ { "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.11", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/acm-governance-policy-addon-controller-rhel9", "defaultStatus": "affected", "versions": [ { "version": "1787683327", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "cpes": [ "cpe:/a:redhat:acm:2.11::el9" ] }, { "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.13", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/acm-governance-policy-addon-controller-rhel9", "defaultStatus": "affected", "versions": [ { "version": "1787259078", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "cpes": [ "cpe:/a:redhat:acm:2.13::el9" ] }, { "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.14", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/acm-governance-policy-addon-controller-rhel9", "defaultStatus": "affected", "versions": [ { "version": "1787080755", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "cpes": [ "cpe:/a:redhat:acm:2.14::el9" ] }, { "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.15", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/acm-governance-policy-addon-controller-rhel9", "defaultStatus": "affected", "versions": [ { "version": "1787238535", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "cpes": [ "cpe:/a:redhat:acm:2.15::el9" ] }, { "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/acm-governance-policy-addon-controller-rhel9", "defaultStatus": "affected", "versions": [ { "version": "1787080753", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "cpes": [ "cpe:/a:redhat:acm:2.16::el9" ] }, { "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "rhacm2/acm-governance-policy-addon-controller-rhel9", "defaultStatus": "affected", "versions": [ { "version": "1787227696", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "cpes": [ "cpe:/a:redhat:acm:2.17::el9" ] } ], "references": [ { "url": "https://access.redhat.com/errata/RHSA-2026:60386", "name": "RHSA-2026:60386", "tags": [ "vendor-advisory", "x_refsource_REDHAT" ] }, { "url": "https://access.redhat.com/errata/RHSA-2026:60387", "name": "RHSA-2026:60387", "tags": [ "vendor-advisory", "x_refsource_REDHAT" ] }, { "url": "https://access.redhat.com/errata/RHSA-2026:60388", "name": "RHSA-2026:60388", "tags": [ "vendor-advisory", "x_refsource_REDHAT" ] }, { "url": "https://access.redhat.com/errata/RHSA-2026:60389", "name": "RHSA-2026:60389", "tags": [ "vendor-advisory", "x_refsource_REDHAT" ] }, { "url": "https://access.redhat.com/errata/RHSA-2026:60390", "name": "RHSA-2026:60390", "tags": [ "vendor-advisory", "x_refsource_REDHAT" ] }, { "url": "https://access.redhat.com/errata/RHSA-2026:60391", "name": "RHSA-2026:60391", "tags": [ "vendor-advisory", "x_refsource_REDHAT" ] }, { "url": "https://access.redhat.com/security/cve/CVE-2026-66793", "tags": [ "vdb-entry", "x_refsource_REDHAT" ] }, { "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507538", "name": "RHBZ#2507538", "tags": [ "issue-tracking", "x_refsource_REDHAT" ] } ], "datePublic": "2026-08-18T14:25:00.000Z", "problemTypes": [ { "descriptions": [ { "cweId": "CWE-20", "description": "Improper Input Validation", "lang": "en", "type": "CWE" } ] } ], "x_redhatCweChain": "CWE-20: Improper Input Validation", "workarounds": [ { "lang": "en", "value": "To mitigate this issue, restrict users' ability to annotate ManagedClusterAddOn resources within the hub cluster. Ensure that only trusted administrators have namespace-level annotate permissions on these resources. Regularly review and audit permissions related to ManagedClusterAddOn resources to prevent unauthorized modifications. If a service is restarted or reloaded, these permission changes will persist." } ], "timeline": [ { "lang": "en", "time": "2026-07-27T00:00:00.000Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-08-18T14:25:00.000Z", "value": "Made public." } ], "providerMetadata": { "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-08-27T02:15:52.406Z" }, "x_generator": { "engine": "cvelib 1.8.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-08-18T17:59:33.712099Z", "id": "CVE-2026-66793", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-18T17:59:45.726Z" } } ] } }