SB2026041761 - Information disclosure in Splunk MCP Server
Published: April 17, 2026
Security Bulletin ID
SB2026041761
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Inclusion of Sensitive Information in Log Files (CVE-ID: CVE-2026-20205)
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.
Remediation
Install update from vendor's website.