Splunk MCP Server <1.2.1 Command Injection via credential deserialization
CVE-2026-76404 Published on August 19, 2026
Remote Code Execution (RCE) through Deserialization of Untrusted Data in Splunk MCP Server app
In Splunk MCP Server app versions below 1.2.1, a user who holds the "admin" Splunk role could execute arbitrary commands on the underlying operating system. The vulnerability is possible because of missing input validation in the app's credential management component, which deserializes stored data without checking whether the content is of the expected type.
Weakness Type
What is a Marshaling, Unmarshaling Vulnerability?
The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
CVE-2026-76404 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.
Products Associated with CVE-2026-76404
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Affected Versions
Splunk MCP Server app:- Version 1.2 and below 1.2.1 is affected.