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2 vulnerabilities found for Splunk MCP Server by Splunk
CVE-2026-20205 (GCVE-0-2026-20205)
Vulnerability from cvelistv5
Published
2026-04-15 15:17
Modified
2026-04-15 17:39
Severity ?
VLAI Severity ?
EPSS score ?
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.
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Splunk | Splunk MCP Server |
Version: 1.0 < 1.0.3 |
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CVE-2025-20381 (GCVE-0-2025-20381)
Vulnerability from cvelistv5
Published
2025-12-03 17:00
Modified
2025-12-03 21:29
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-863 - The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
Summary
In Splunk MCP Server app versions below 0.2.4, a user with access to the "run_splunk_query" Model Context Protocol (MCP) tool could bypass the SPL command allowlist controls in MCP by embedding SPL commands as sub-searches, leading to unauthorized actions beyond the intended MCP restrictions.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Splunk | Splunk MCP Server |
Version: 0.2 < 0.2.4 |
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