CVE-2026-76404
Received Received - Intake

Splunk MCP Server Command Injection Vulnerability

Publication date: 2026-08-19

Last updated on: 2026-08-19

Assigner: Cisco Systems, Inc.

Description
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.

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Meta Information

Published
2026-08-19
Last Modified
2026-08-19
Generated
2026-08-20
AI Q&A
2026-08-20
EPSS Evaluated
N/A
NVD
CVE-2026-76404
EUVD
EUVD-2026-62969

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
splunk mcp_server to 1.2.1 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

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Executive Summary

This vulnerability exists in Splunk MCP Server app versions below 1.2.1. A user with the admin role can execute arbitrary commands on the underlying operating system due to missing input validation in the app's credential management component. The app deserializes stored data without verifying if it matches the expected type, allowing command execution.

Impact Analysis

An attacker with admin access could exploit this to run malicious commands on the server, potentially leading to full system compromise, data theft, or disruption of services. This could allow unauthorized access to sensitive data or control over the affected system.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating compliance requirements for GDPR, HIPAA, and other regulations. It may result in legal penalties, loss of certification, or reputational damage due to compromised data integrity and confidentiality.

Mitigation Strategies

Immediately upgrade the Splunk MCP Server app to version 1.2.1 or later to address the missing input validation flaw. Restrict admin role privileges to only necessary users and monitor for unauthorized command execution attempts.

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