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CVE-2026-20205 is an information-disclosure vulnerability in Splunk MCP Server app versions earlier than 1.0.3. The application records user session and authorization tokens in clear text in internal logging data. A user authorized to access Splunk's internal index, or one granted the high-privilege mcp_tool_admin capability, can read the exposed tokens. Local access to the relevant log files also permits retrieval of the cleartext token data.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability in the Splunk MCP Server app that exposed session and authentication tokens by logging them in cleartext; it was patched in version 1.0.3.
A high-severity information disclosure vulnerability in the MCP Server application that could allow an authenticated attacker to view user sessions and authorization tokens in clear text, requiring local log access or administrative access to internal indexes.
An information disclosure vulnerability in Splunk's _internal index referenced only as part of recent advisory history.
A high-severity vulnerability in Splunk MCP Server that allows authenticated attackers to read user authorization and session tokens in plaintext, given access to the _internal index or mcp_tool_admin permissions.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.