What’s Vulnerable › Vulnerabilities
CVE-2026-76404: Remote Code Execution (RCE) through Deserialization of Untrusted Data in Splunk MCP Server app
- Severity: critical (CVSS 9.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-19 · updated 2026-10-24
- Weakness: CWE-502
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.
Affected products
- Splunk MCP Server app: before 1.2.1 — fixed in 1.2.1
How to fix
Upgrade to a fixed version: Splunk MCP Server app 1.2.1. Check the vendor advisory for mitigations.
References
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