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6 vulnerabilities found for Splunk MCP Server by Splunk
CVE-2026-76286 (GCVE-0-2026-76286)
Vulnerability from nvd – Published: 2026-10-07 20:46 – Updated: 2026-10-08 18:00
VLAI
EPSS
VEX
Title
Server-Side Request Forgery (SSRF) through Custom API Tools in Splunk MCP Server
Summary
In Splunk MCP Server versions below 1.2.1, Splunk MCP Server could send the Splunk platform authentication token of a user who runs a custom Application Programming Interface (API) tool to the URL configured for that tool. If another user controls that URL, they could capture the token and use it to access data and perform actions as the user who ran the tool. Successful exploitation requires a user who holds a role that contains the mcp_tool_execute capability to run a custom API tool configured by another user. For more information see Configure the Splunk MCP Server (https://help.splunk.com/en/splunk-enterprise/mcp-server-for-splunk-platform/1.2/configure-the-splunk-mcp-server) and Managing custom tools in Splunk MCP Server (https://help.splunk.com/en/splunk-enterprise/mcp-server-for-splunk-platform/1.2/managing-custom-tools-in-splunk-mcp-server) in the Splunk documentation.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 18:00 UTC
CWE
- CWE-918 - The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Splunk | Splunk MCP Server |
Affected:
1.2 , < 1.2.1
(custom)
|
Date Public
2026-10-07 00:00
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CVE-2026-20205 (GCVE-0-2026-20205)
Vulnerability from nvd – Published: 2026-04-15 15:17 – Updated: 2026-04-15 17:39
VLAI
EPSS
VEX
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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-15 17:39 UTC
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
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Splunk | Splunk MCP Server |
Affected:
1.0 , < 1.0.3
(custom)
|
Date Public
2026-04-15 00:00
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CVE-2025-20381 (GCVE-0-2025-20381)
Vulnerability from nvd – Published: 2025-12-03 17:00 – Updated: 2025-12-03 21:29
VLAI
EPSS
VEX
Title
SPL commands allowlist controls bypass in Splunk MCP Server app through "run_splunk_query" MCP tool
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.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-03 21:29 UTC
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.
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Splunk | Splunk MCP Server |
Affected:
0.2 , < 0.2.4
(custom)
|
Date Public
2025-12-03 00:00
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CVE-2026-76286 (GCVE-0-2026-76286)
Vulnerability from cvelistv5 – Published: 2026-10-07 20:46 – Updated: 2026-10-08 18:00
VLAI
EPSS
VEX
Title
Server-Side Request Forgery (SSRF) through Custom API Tools in Splunk MCP Server
Summary
In Splunk MCP Server versions below 1.2.1, Splunk MCP Server could send the Splunk platform authentication token of a user who runs a custom Application Programming Interface (API) tool to the URL configured for that tool. If another user controls that URL, they could capture the token and use it to access data and perform actions as the user who ran the tool. Successful exploitation requires a user who holds a role that contains the mcp_tool_execute capability to run a custom API tool configured by another user. For more information see Configure the Splunk MCP Server (https://help.splunk.com/en/splunk-enterprise/mcp-server-for-splunk-platform/1.2/configure-the-splunk-mcp-server) and Managing custom tools in Splunk MCP Server (https://help.splunk.com/en/splunk-enterprise/mcp-server-for-splunk-platform/1.2/managing-custom-tools-in-splunk-mcp-server) in the Splunk documentation.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 18:00 UTC
CWE
- CWE-918 - The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Splunk | Splunk MCP Server |
Affected:
1.2 , < 1.2.1
(custom)
|
Date Public
2026-10-07 00:00
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CVE-2026-20205 (GCVE-0-2026-20205)
Vulnerability from cvelistv5 – Published: 2026-04-15 15:17 – Updated: 2026-04-15 17:39
VLAI
EPSS
VEX
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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-15 17:39 UTC
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
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Splunk | Splunk MCP Server |
Affected:
1.0 , < 1.0.3
(custom)
|
Date Public
2026-04-15 00:00
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CVE-2025-20381 (GCVE-0-2025-20381)
Vulnerability from cvelistv5 – Published: 2025-12-03 17:00 – Updated: 2025-12-03 21:29
VLAI
EPSS
VEX
Title
SPL commands allowlist controls bypass in Splunk MCP Server app through "run_splunk_query" MCP tool
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.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-03 21:29 UTC
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.
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Splunk | Splunk MCP Server |
Affected:
0.2 , < 0.2.4
(custom)
|
Date Public
2025-12-03 00:00
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