CVE-2026-76404
Remote Code Execution (RCE) through Deserialization of Untrusted Data in Splunk MCP Server app
CVSS Score
9.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-502 |
| Vendor | splunk |
| Product | splunk mcp server app |
| Published | Aug 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Splunk / Splunk MCP Server app
1.2 < 1.2.1
References
Credits
🔍 Kuniyoshi Noguchi (KuniNogu)