{"api_version":"1","generated_at":"2026-08-24T06:49:16+00:00","cve":"CVE-2026-66793","urls":{"html":"https://cve.report/CVE-2026-66793","api":"https://cve.report/api/cve/CVE-2026-66793.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-66793","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-66793"},"summary":{"title":"Governance-policy-addon-controller: governance-policy-addon-controller: arbitrary container image override via managedclusteraddon annotation enables rce on spoke","description":"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.","state":"PUBLISHED","assigner":"redhat","published_at":"2026-08-18 15:17:00","updated_at":"2026-08-20 13:08:53"},"problem_types":["CWE-20","CWE-20 Improper Input Validation"],"metrics":[{"version":"3.1","source":"secalert@redhat.com","type":"Secondary","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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"}}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2507538","name":"https://bugzilla.redhat.com/show_bug.cgi?id=2507538","refsource":"secalert@redhat.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://access.redhat.com/security/cve/CVE-2026-66793","name":"https://access.redhat.com/security/cve/CVE-2026-66793","refsource":"secalert@redhat.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-66793","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66793","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Red Hat","product":"Red Hat Advanced Cluster Management for Kubernetes 2","version":"","platforms":[]}],"timeline":[{"source":"CNA","time":"2026-07-27T00:00:00.000Z","lang":"en","value":"Reported to Red Hat."},{"source":"CNA","time":"2026-08-18T14:25:00.000Z","lang":"en","value":"Made public."}],"solutions":[],"workarounds":[{"source":"CNA","title":"","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.","time":"","lang":"en"}],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"66793","cve":"CVE-2026-66793","epss":"0.005740000","percentile":"0.447830000","score_date":"2026-08-23","updated_at":"2026-08-24 00:11:18"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-66793","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","timestamp":"2026-08-18T17:59:33.712099Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-08-18T17:59:45.726Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:acm:2"],"defaultStatus":"affected","packageName":"rhacm2/acm-governance-policy-addon-controller-rhel9","product":"Red Hat Advanced Cluster Management for Kubernetes 2","vendor":"Red Hat"}],"datePublic":"2026-08-18T14:25:00.000Z","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."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Important"},"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"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","description":"Improper Input Validation","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-18T15:02:31.273Z","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat"},"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-66793"},{"name":"RHBZ#2507538","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2507538"}],"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."}],"title":"Governance-policy-addon-controller: governance-policy-addon-controller: arbitrary container image override via managedclusteraddon annotation enables rce on spoke","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."}],"x_generator":{"engine":"cvelib 1.8.0"},"x_redhatCweChain":"CWE-20: Improper Input Validation"}},"cveMetadata":{"assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","assignerShortName":"redhat","cveId":"CVE-2026-66793","datePublished":"2026-08-18T15:02:31.273Z","dateReserved":"2026-07-27T17:51:24.886Z","dateUpdated":"2026-08-18T17:59:45.726Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-18 15:17:00","lastModifiedDate":"2026-08-20 13:08:53","problem_types":["CWE-20","CWE-20 Improper Input Validation"],"metrics":{"cvssMetricV31":[{"source":"secalert@redhat.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-18T17:59:33.712099Z","id":"CVE-2026-66793","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"66793","Ordinal":"1","Title":"Governance-policy-addon-controller: governance-policy-addon-cont","CVE":"CVE-2026-66793","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"66793","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Governance-policy-addon-controller: governance-policy-addon-cont"}]}}}