# CVE-2026-20205: Sensitive Information Disclosure in ''_internal'' index in Splunk MCP Server app

> CVE-2026-20205: Sensitive Information Disclosure in ''_internal'' index in Splunk MCP Server app. CVSS 7.2 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-20205
Last updated: 2026-06-17T10:17:17Z

- Published: 2026-04-15 15:17 UTC · Updated: 2026-06-17 10:17 UTC · Assigner: cisco
- CVSS: 7.2 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS: 0.28%, 20th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-532

## 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.

## Affected vendors and products

- Splunk: Splunk MCP Server

## Tracked companies

- [Splunk](https://rewindex.com/company/splunk.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-20205)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-20205)
- [https://advisory.splunk.com/advisories/SVD-2026-0407](https://advisory.splunk.com/advisories/SVD-2026-0407)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-20205 · Markdown: https://rewindex.com/cve/CVE-2026-20205.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-20205 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:14:39.748Z