Inclusion of Sensitive Information in Log Files in Splunk MCP Server - CVE-2026-20205
Published: April 17, 2026
Vulnerability identifier: #VU126415
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-20205
CWE-ID: CWE-532
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Splunk Inc.
Affected software:
Splunk MCP Server
Splunk MCP Server
Detailed vulnerability description
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to insertion of sensitive information into log files in the Splunk _internal index and log files when storing session and authorization tokens in clear text. A remote privileged user can read the exposed tokens to disclose sensitive information.
Exploitation requires access to the _internal index, local log files, or the mcp_tool_admin capability.
How to mitigate CVE-2026-20205
Install security update from vendor's website.