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CVE-2026-4789

Estado: AnalizadaCrítica (9.8)—

Kyverno, versions 1.16.0 and later, are vulnerable to SSRF due to unrestricted CEL HTTP functions.

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.

Vector CVSS AV:N/PR:N/UI:N indica explotación remota sin privilegios (T1190). CWE-918 SSRF permite proxying malicioso (T1090) y acceso a datos internos (T1005) mediante funciones HTTP sin restricciones en Kyverno.

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

Filter Network TrafficVulnerability ScanningSSL/TLS InspectionPrivileged Account ManagementNetwork SegmentationNetwork Intrusion Prevention

Tecnologías afectadas (1)

Kyverno — Kyverno

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-4789",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-4789",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-04-01T18:43:09.447511Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cret@cert.org",
      "affectedData": [
        {
          "vendor": "Kyverno",
          "product": "Kyverno",
          "versions": [
            {
              "status": "affected",
              "version": "1.16.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-03-30T21:17:10.843",
  "references": [
    {
      "url": "https://github.com/kyverno/kyverno",
      "tags": [
        "Product"
      ],
      "source": "cret@cert.org"
    },
    {
      "url": "https://kb.cert.org/vuls/id/655822",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cret@cert.org"
    },
    {
      "url": "https://portswigger.net/web-security/ssrf",
      "tags": [
        "Technical Description"
      ],
      "source": "cret@cert.org"
    },
    {
      "url": "https://www.kb.cert.org/vuls/id/655822",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Kyverno, versions 1.16.0 and later, are vulnerable to SSRF due to unrestricted CEL HTTP functions."
    },
    {
      "lang": "es",
      "value": "Kyverno, versiones 1.16.0 y posteriores, son vulnerables a SSRF debido a funciones HTTP CEL sin restricciones."
    }
  ],
  "lastModified": "2026-06-17T10:57:13.363",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F2E0715F-61DE-45F5-840E-06CF5C468D33",
              "versionEndIncluding": "1.17.1",
              "versionStartIncluding": "1.16.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cret@cert.org"
}