Sensitive Information Disclosure in ”_internal” index in Splunk MCP Server app_CVE-2026-20205

{
    "lastseen": "",
    "description": "In Splunk MCP Server app versions below 1.0.3 , a user who holds a role with access to the Splunk `_internal` index or possesses the high-privilege capability `mcp_tool_admin` could view users session and authorization tokens in clear text.<br><br>The vulnerability would require either local access to the log files or administrative access to internal indexes, which by default only the admin role receives. <br><br>Review roles and capabilities on your instance and restrict internal index access to administrator-level roles. See [Define roles on the Splunk platform with capabilities](https://docs.splunk.com/Documentation/Splunk/latest/Security/Rolesandcapabilities) and [Connecting to MCP Server and Admin settings](https://help.splunk.com/en/splunk-enterprise/mcp-server-for-splunk-platform/connecting-to-mcp-server-and-admin-settings) in the Splunk documentation for more information.",
    "published": "2026-04-15T15:17:58.202Z",
    "modified": "2026-04-15T15:17:58.202Z",
    "type": "cve",
    "title": "Sensitive Information Disclosure in ''_internal'' index in Splunk MCP Server app",
    "source": "cisco",
    "references": "https://advisory.splunk.com/advisories/SVD-2026-0407",
    "id": "CVE-2026-20205",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Splunk Splunk MCP Server 1.0",
    "sourceHref": "",
    "cvss": {
        "score": 7.2,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
            "baseSeverity": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Splunk MCP Server",
    "version": "1.0",
    "vendor": "Splunk",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}