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CVE-2026-76276

Estado: AnalizadaMedia (4.3)—

En las versiones de Splunk Enterprise inferiores a 10.4.3, 10.2.7 y 10.0.10, un usuario con pocos privilegios que no tenga los roles de Splunk "admin" o "power" podía obtener el código fuente original de la app Discover Splunk Observability Cloud a través de Splunk Web. La vulnerabilidad es posible porque los paquetes JavaScript de producción de la app contienen source maps incrustados que incluyen el código fuente original.

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Para más información, consulte About configuring role-based user access (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/manage-splunk-platform-users-and-roles/about-configuring-role-based-user-access), Splunk Observability Cloud previews (https://help.splunk.com/en/splunk-enterprise/search/search-manual/10.4/observability/splunk-observability-cloud-previews) y Navigating Splunk Web (https://help.splunk.com/en/splunk-enterprise/search/search-tutorial/10.4/part-1-getting-started/navigating-splunk-web) en la documentación de Splunk.

Las versiones 9.4.x de Splunk Enterprise no se ven afectadas.

Traducción automática del texto original de NVD (en inglés).

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.

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningThreat Intelligence ProgramPrivileged Account ManagementNetwork SegmentationDisable or Remove Feature or ProgramApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Splunk — Splunk

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-76276",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-76276",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-08T18:00:46.751178Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "psirt@cisco.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@cisco.com",
      "affectedData": [
        {
          "vendor": "Splunk",
          "modules": [
            "Splunk Web"
          ],
          "product": "Splunk Enterprise",
          "versions": [
            {
              "status": "affected",
              "version": "10.4",
              "lessThan": "10.4.3",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "10.2",
              "lessThan": "10.2.7",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "10.0",
              "lessThan": "10.0.10",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-10-07T21:17:18.760",
  "references": [
    {
      "url": "https://advisory.splunk.com/advisories/SVD-2026-1001",
      "tags": [
        "Vendor Advisory",
        "Mitigation"
      ],
      "source": "psirt@cisco.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "psirt@cisco.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1188"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Splunk Enterprise versions below 10.4.3, 10.2.7, and 10.0.10, a low-privileged user that does not hold the \"admin\" or \"power\" Splunk roles could retrieve original source code for the Discover Splunk Observability Cloud app through Splunk Web. The vulnerability is possible because production JavaScript bundles for the app contain embedded source maps that include original source code. For more information see About configuring role-based user access (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/manage-splunk-platform-users-and-roles/about-configuring-role-based-user-access), Splunk Observability Cloud previews (https://help.splunk.com/en/splunk-enterprise/search/search-manual/10.4/observability/splunk-observability-cloud-previews), and Navigating Splunk Web (https://help.splunk.com/en/splunk-enterprise/search/search-tutorial/10.4/part-1-getting-started/navigating-splunk-web) in the Splunk documentation.\n\nSplunk Enterprise versions 9.4.x are not affected."
    }
  ],
  "lastModified": "2026-10-14T12:05:20.110",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "821853EA-D03C-4017-95A9-3770CE48BE8C",
              "versionEndExcluding": "10.0.10",
              "versionStartIncluding": "10.0.0"
            },
            {
              "criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "37593BC0-5F11-410C-B823-195F5BFAD2BF",
              "versionEndExcluding": "10.2.7",
              "versionStartIncluding": "10.2.0"
            },
            {
              "criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1268F2CB-E517-45A6-917E-9C1FDBA6CA0A",
              "versionEndExcluding": "10.4.3",
              "versionStartIncluding": "10.4.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "psirt@cisco.com"
}