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CVE-2026-4342

Estado: AnalizadaAlta (8.8)—

A security issue was discovered in ingress-nginx where a combination of Ingress annotations can be used to inject configuration into nginx. This can lead to arbitrary code execution in the context of the ingress-nginx controller, and disclosure of Secrets accessible to the controller. (Note that in the default installation, the controller can access all Secrets cluster-wide.)

CVSS

Probabilidad de explotación (EPSS)

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.

Acceso autenticado (PR:L) a servicio remoto Kubernetes Ingress; inyección de configuración nginx → ejecución de código arbitrario (T1059), lectura de Secrets (T1552.007) y manipulación de ServiceAccounts (T1098.003).

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

Privileged Account ManagementUser Account ManagementNetwork SegmentationDisable or Remove Feature or ProgramVulnerability ScanningThreat Intelligence Program

Tecnologías afectadas (1)

Kubernetes — Nginx Ingress Controller

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-4342",
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          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
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              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-03-20T00:00:00+00:00"
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          "vendor": "Kubernetes",
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  "published": "2026-03-19T22:16:43.143",
  "references": [
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      "url": "https://github.com/kubernetes/kubernetes/issues/137893",
      "tags": [
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      "source": "jordan@liggitt.net"
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
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      "source": "jordan@liggitt.net",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
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    },
    {
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      "description": [
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  "descriptions": [
    {
      "lang": "en",
      "value": "A security issue was discovered in ingress-nginx where a combination of Ingress annotations can be used to inject configuration into nginx. This can lead to arbitrary code execution in the context of the ingress-nginx controller, and disclosure of Secrets accessible to the controller. (Note that in the default installation, the controller can access all Secrets cluster-wide.)"
    },
    {
      "lang": "es",
      "value": "Se descubrió un problema de seguridad en ingress-nginx donde una combinación de anotaciones de Ingress puede utilizarse para inyectar configuración en nginx. Esto puede conducir a la ejecución de código arbitrario en el contexto del controlador ingress-nginx, y a la divulgación de Secrets accesibles para el controlador. (Tenga en cuenta que en la instalación predeterminada, el controlador puede acceder a todos los Secrets a nivel de clúster.)"
    }
  ],
  "lastModified": "2026-06-17T10:56:26.790",
  "configurations": [
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      "nodes": [
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          "negate": false,
          "cpeMatch": [
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}