CVE-2026-73268
A flaw was found in the cluster-curator-controller component of multicluster engine (MCE). A tenant with create or update permissions on ClusterCurator resources can inject an arbitrary Job specification. This is possible because the CreateJob() function does not validate user-controlled input when unmarshaling the spec.install.overrideJob raw extension. Successful exploitation allows the injected Job to run with the controller's elevated privileges, leading to arbitrary code execution and privilege escalation, potentially accessing cluster-wide secrets.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Puntuación base: 9.9
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.88%
- Percentil entre todas las CVEs puntuadas: 58
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1210Exploitation of Remote Serviceslateral movement85 % - Impacto principal
T1059Command and Scripting Interpreterexecution90 % - Impacto secundario
T1068Exploitation for Privilege Escalationprivilege escalation80 % - Impacto secundario
T1552Unsecured Credentialscredential access75 %
Acceso remoto con PR:L (tenant autenticado) inyecta especificación de Job malicioso sin validación; ejecución con privilegios elevados del controlador accede a secretos del clúster.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (2)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-94
Referencias
- https://access.redhat.com/errata/RHSA-2026:59556
- https://access.redhat.com/errata/RHSA-2026:59557
- https://access.redhat.com/errata/RHSA-2026:59558
- https://access.redhat.com/errata/RHSA-2026:59559
- https://access.redhat.com/errata/RHSA-2026:59579
- https://access.redhat.com/errata/RHSA-2026:59593
- https://access.redhat.com/security/cve/CVE-2026-73268
- https://bugzilla.redhat.com/show_bug.cgi?id=2514219
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-73268",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-73268",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-08-12T19:45:32.285133Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "secalert@redhat.com",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 9.9,
"attackVector": "NETWORK",
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 6,
"exploitabilityScore": 3.1
}
]
},
"affected": [
{
"source": "secalert@redhat.com",
"affectedData": [
{
"cpes": [
"cpe:/a:redhat:multicluster_engine:2.10::el9"
],
"vendor": "Red Hat",
"product": "multicluster engine for Kubernetes 2.10",
"versions": [
{
"status": "unaffected",
"version": "1787201612",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "multicluster-engine/cluster-curator-controller-rhel9",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:multicluster_engine:2.11::el9"
],
"vendor": "Red Hat",
"product": "multicluster engine for Kubernetes 2.11",
"versions": [
{
"status": "unaffected",
"version": "1787238383",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "multicluster-engine/cluster-curator-controller-rhel9",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:multicluster_engine:2.17::el9"
],
"vendor": "Red Hat",
"product": "multicluster engine for Kubernetes 2.17",
"versions": [
{
"status": "unaffected",
"version": "1786750700",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "multicluster-engine/cluster-curator-controller-rhel9",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:multicluster_engine:2.6::el9"
],
"vendor": "Red Hat",
"product": "multicluster engine for Kubernetes 2.6",
"versions": [
{
"status": "unaffected",
"version": "1787264185",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "multicluster-engine/cluster-curator-controller-rhel9",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:multicluster_engine:2.8::el9"
],
"vendor": "Red Hat",
"product": "multicluster engine for Kubernetes 2.8",
"versions": [
{
"status": "unaffected",
"version": "1787259011",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "multicluster-engine/cluster-curator-controller-rhel9",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:multicluster_engine:2.9::el9"
],
"vendor": "Red Hat",
"product": "multicluster engine for Kubernetes 2.9",
"versions": [
{
"status": "unaffected",
"version": "1787201646",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "multicluster-engine/cluster-curator-controller-rhel9",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"defaultStatus": "affected"
}
]
}
],
"published": "2026-08-12T20:17:53.650",
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:59556",
"source": "secalert@redhat.com"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:59557",
"source": "secalert@redhat.com"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:59558",
"source": "secalert@redhat.com"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:59559",
"source": "secalert@redhat.com"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:59579",
"source": "secalert@redhat.com"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:59593",
"source": "secalert@redhat.com"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-73268",
"source": "secalert@redhat.com"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2514219",
"source": "secalert@redhat.com"
}
],
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"type": "Secondary",
"source": "secalert@redhat.com",
"description": [
{
"lang": "en",
"value": "CWE-94"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the cluster-curator-controller component of multicluster engine (MCE). A tenant with create or update permissions on ClusterCurator resources can inject an arbitrary Job specification. This is possible because the CreateJob() function does not validate user-controlled input when unmarshaling the spec.install.overrideJob raw extension. Successful exploitation allows the injected Job to run with the controller's elevated privileges, leading to arbitrary code execution and privilege escalation, potentially accessing cluster-wide secrets."
}
],
"lastModified": "2026-09-29T20:17:23.587",
"sourceIdentifier": "secalert@redhat.com"
}