CVE-2026-20205 (GCVE-0-2026-20205)

Vulnerability from cvelistv5 – Published: 2026-04-15 15:17 – Updated: 2026-04-15 17:39
VLAI?
Title
Sensitive Information Disclosure in ''_internal'' index in Splunk MCP Server app
Summary
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.
Severity ?
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-532 - Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information.
Assigner
References
Impacted products
Vendor Product Version
Splunk Splunk MCP Server Affected: 1.0 , < 1.0.3 (custom)
Create a notification for this product.
Date Public ?
2026-04-15 00:00
Credits
Charlie Huggard, Splunk
Show details on NVD website
To clipboard 

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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