CVE-2026-76404: The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid. in Splunk Splunk MCP Server app
CVE-2026-76404 is a critical vulnerability in the Splunk MCP Server app version 1.2. It allows a user with the admin Splunk role to execute arbitrary commands on the underlying operating system due to insecure deserialization of untrusted data without proper validation in the credential management component.
AI Analysis
Technical Summary
The Splunk MCP Server app versions equal to 1.2 contain a vulnerability where the application deserializes untrusted data without sufficiently verifying that the resulting data is valid. This flaw exists in the credential management component and allows an admin user to execute arbitrary OS commands. The vulnerability arises from missing input validation during deserialization, enabling potential remote code execution by a privileged user.
Potential Impact
An attacker with the admin role in Splunk can exploit this vulnerability to execute arbitrary commands on the underlying operating system, leading to full compromise of the affected system. The CVSS score of 9.1 indicates a critical severity with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is provided in the available data. Until a patch is available, restrict admin role assignments and monitor for suspicious activity related to this component.
CVE-2026-76404: The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid. in Splunk Splunk MCP Server app
Description
CVE-2026-76404 is a critical vulnerability in the Splunk MCP Server app version 1.2. It allows a user with the admin Splunk role to execute arbitrary commands on the underlying operating system due to insecure deserialization of untrusted data without proper validation in the credential management component.
CVSS v3.1
Score 9.1critical
Affected software
pkg:github/splunk/mcp-server-appRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Splunk MCP Server app versions equal to 1.2 contain a vulnerability where the application deserializes untrusted data without sufficiently verifying that the resulting data is valid. This flaw exists in the credential management component and allows an admin user to execute arbitrary OS commands. The vulnerability arises from missing input validation during deserialization, enabling potential remote code execution by a privileged user.
Potential Impact
An attacker with the admin role in Splunk can exploit this vulnerability to execute arbitrary commands on the underlying operating system, leading to full compromise of the affected system. The CVSS score of 9.1 indicates a critical severity with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is provided in the available data. Until a patch is available, restrict admin role assignments and monitor for suspicious activity related to this component.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2026-08-19T12:02:03.632Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a862261acd9273b49a704a5
Added to database: 08/19/2026, 21:38:41 UTC
Last enriched: 08/19/2026, 21:52:21 UTC
Last updated: 08/20/2026, 03:31:11 UTC
Views: 18
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