FKIE_CVE-2026-20202

Vulnerability from fkie_nvd - Published: 2026-04-15 16:16 - Updated: 2026-10-26 22:10
Severity
6.6 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Summary
In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.2603.0, 10.3.2512.6, 10.2.2510.10, 10.1.2507.20, 10.0.2503.13, and 9.3.2411.127, a user who holds a role that contains the high-privilege capability `edit_user`could create a specially crafted username that includes a null byte or a non-UTF-8 percent-encoded byte due to improper input validation.<br><br>This could lead to inconsistent conversion of usernames into a proper format for storage and account management inconsistencies, such as being unable to edit or delete affected users.
References
psirt@cisco.comhttps://advisory.splunk.com/advisories/SVD-2026-0401Vendor Advisory
Impacted products
Vendor Product Version
splunk splunk *
splunk splunk *
splunk splunk *
splunk splunk *
splunk splunk_cloud_platform *
splunk splunk_cloud_platform *
splunk splunk_cloud_platform *
splunk splunk_cloud_platform *
splunk splunk_cloud_platform *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Splunk Enterprise",
          "vendor": "Splunk",
          "versions": [
            {
              "lessThan": "10.2.2",
              "status": "affected",
              "version": "10.2",
              "versionType": "custom"
            },
            {
              "lessThan": "10.0.5",
              "status": "affected",
              "version": "10.0",
              "versionType": "custom"
            },
            {
              "lessThan": "9.4.10",
              "status": "affected",
              "version": "9.4",
              "versionType": "custom"
            },
            {
              "lessThan": "9.3.11",
              "status": "affected",
              "version": "9.3",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Splunk Cloud Platform",
          "vendor": "Splunk",
          "versions": [
            {
              "lessThan": "Not Affected",
              "status": "affected",
              "version": "10.4.2603",
              "versionType": "custom"
            },
            {
              "lessThan": "10.3.2512.6",
              "status": "affected",
              "version": "10.3.2512",
              "versionType": "custom"
            },
            {
              "lessThan": "10.2.2510.10",
              "status": "affected",
              "version": "10.2.2510",
              "versionType": "custom"
            },
            {
              "lessThan": "10.1.2507.20",
              "status": "affected",
              "version": "10.1.2507",
              "versionType": "custom"
            },
            {
              "lessThan": "10.0.2503.13",
              "status": "affected",
              "version": "10.0.2503",
              "versionType": "custom"
            },
            {
              "lessThan": "9.3.2411.127",
              "status": "affected",
              "version": "9.3.2411",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "psirt@cisco.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
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              "versionEndExcluding": "9.3.11",
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            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "9.3.2411.127",
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              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "10.3.2512.6",
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              "vulnerable": true
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          ],
          "negate": false,
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      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.2603.0, 10.3.2512.6, 10.2.2510.10, 10.1.2507.20, 10.0.2503.13, and 9.3.2411.127, a user who holds a role that contains the high-privilege capability `edit_user`could create a specially crafted username that includes a null byte or a non-UTF-8 percent-encoded byte due to improper input validation.\u003cbr\u003e\u003cbr\u003eThis could lead to inconsistent conversion of usernames into a proper format for storage and account management inconsistencies, such as being unable to edit or delete affected users."
    },
    {
      "lang": "es",
      "value": "En las versiones de Splunk Enterprise anteriores a 10.2.2, 10.0.5, 9.4.10 y 9.3.11, y las versiones de Splunk Cloud Platform anteriores a 10.4.2603.0, 10.3.2512.6, 10.2.2510.10, 10.1.2507.20, 10.0.2503.13 y 9.3.2411.127, un usuario con un rol que contiene la capacidad de alto privilegio \u2019edit_user\u2019 podr\u00eda crear un nombre de usuario especialmente dise\u00f1ado que incluye un byte nulo o un byte codificado en porcentaje no UTF-8 debido a una validaci\u00f3n de entrada incorrecta.\n\nEsto podr\u00eda llevar a una conversi\u00f3n inconsistente de los nombres de usuario a un formato adecuado para el almacenamiento y a inconsistencias en la gesti\u00f3n de cuentas, como la imposibilidad de editar o eliminar usuarios afectados."
    }
  ],
  "id": "CVE-2026-20202",
  "lastModified": "2026-10-26T22:10:00.163",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.6,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 0.7,
        "impactScore": 5.9,
        "source": "psirt@cisco.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-20202",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-15T00:00:00+00:00",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-15T16:16:34.120",
  "references": [
    {
      "source": "psirt@cisco.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://advisory.splunk.com/advisories/SVD-2026-0401"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-176"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Secondary"
    }
  ]
}



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