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TI-2026-16407 Aliases CVE-2026-20205GHSA-6qfc-m9fp-c5rm

Sensitive Information Disclosure in ''_internal'' index in Splunk MCP Server app

Priority LOW 33CWE-532Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-532.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00278 20th percentileScored 2026-11-07
Fix Fixed Splunk MCP Server (Splunk): 1.0.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SplunkSplunk MCP Server1.0 to before 1.0.31.0.3Patch availableCNA
  • Splunk MCP Server VendorSplunk Affected 1.0 to before 1.0.3 Fixed in 1.0.3 Patch available CNA

Remediation

  • Fix · CNA Splunk MCP Server (Splunk) Fixed in 1.0.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20205
  2. 2026-10-03 Alias added: GHSA-6qfc-m9fp-c5rm

References

Other 1

  • TI-2026-16444 Unauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk Enterprise KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-00154 The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly… KEVCVSS 3.1HIGH 7.5
  • TI-2023-24841 Remote code execution (RCE) in Splunk Enterprise through Insecure XML Parsing CVSS 3.1HIGH 8.8
  • TI-2023-12257 Injection in https://github.com/curl/curl CVSS 3.1CRITICAL 9.8
  • TI-2022-13930 Information disclosure in https://github.com/curl/curl CVSS 3.1CRITICAL 9.8
  • TI-2022-13917 Incorrect default permissions in https://github.com/curl/curl CVSS 3.1CRITICAL 9.8
See all 450 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences