FKIE_CVE-2026-49095

Vulnerability from fkie_nvd - Published: 2026-05-28 21:16 - Updated: 2026-07-21 10:10
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Summary
Improper Input Validation (CWE-20) in the Kibana Fleet agent policy management feature can lead to privilege escalation. An authenticated user with Fleet management privileges can manipulate agent policy configuration by injecting values into a configuration override mechanism that is not adequately validated. An attacker can cause Elastic Agents to be issued API keys with elevated Elasticsearch privileges, potentially granting unauthorized read and write access to sensitive Elasticsearch security indices beyond what is intended for the Fleet management role.
References
security@elastic.cohttps://discuss.elastic.co/t/kibana-fleet-8-19-16-9-3-5-and-9-4-2-security-update-esa-2026-38/386559Vendor Advisory
Impacted products
Vendor Product Version
elastic kibana *
elastic kibana *
elastic kibana *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Kibana",
          "vendor": "Elastic",
          "versions": [
            {
              "lessThanOrEqual": "9.3.4",
              "status": "affected",
              "version": "9.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.4.1",
              "status": "affected",
              "version": "9.4.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.19.15",
              "status": "affected",
              "version": "8.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@elastic.co"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "43EDC5B3-131D-489E-8447-05C5C599E6A7",
              "versionEndExcluding": "8.19.16",
              "versionStartIncluding": "8.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E9B40710-912A-4157-9F25-89CE26C098A9",
              "versionEndExcluding": "9.3.5",
              "versionStartIncluding": "9.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "81FF6553-FE7A-475D-9D50-5D0FC66FE375",
              "versionEndExcluding": "9.4.2",
              "versionStartIncluding": "9.4.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper Input Validation (CWE-20) in the Kibana Fleet agent policy management feature can lead to privilege escalation. An authenticated user with Fleet management privileges can manipulate agent policy configuration by injecting values into a configuration override mechanism that is not adequately validated. An attacker can cause Elastic Agents to be issued API keys with elevated Elasticsearch privileges, potentially granting unauthorized read and write access to sensitive Elasticsearch security indices beyond what is intended for the Fleet management role."
    },
    {
      "lang": "es",
      "value": "La Validaci\u00f3n de Entrada Inadecuada (CWE-20) en la caracter\u00edstica de gesti\u00f3n de pol\u00edticas de agentes de Kibana Fleet puede conducir a una escalada de privilegios. Un usuario autenticado con privilegios de gesti\u00f3n de Fleet puede manipular la configuraci\u00f3n de pol\u00edticas de agentes inyectando valores en un mecanismo de anulaci\u00f3n de configuraci\u00f3n que no est\u00e1 adecuadamente validado. Un atacante puede hacer que se emitan claves API a los Elastic Agents con privilegios elevados de Elasticsearch, otorgando potencialmente acceso de lectura y escritura no autorizado a \u00edndices de seguridad sensibles de Elasticsearch m\u00e1s all\u00e1 de lo previsto para el rol de gesti\u00f3n de Fleet."
    }
  ],
  "id": "CVE-2026-49095",
  "lastModified": "2026-07-21T10:10:00.103",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 5.2,
        "source": "security@elastic.co",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-49095",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-29T00:00:00+00:00",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-28T21:16:34.660",
  "references": [
    {
      "source": "security@elastic.co",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://discuss.elastic.co/t/kibana-fleet-8-19-16-9-3-5-and-9-4-2-security-update-esa-2026-38/386559"
    }
  ],
  "sourceIdentifier": "security@elastic.co",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "security@elastic.co",
      "type": "Secondary"
    }
  ]
}



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