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Critical · 9.1 CVE-2026-76404 EUVD-2026-62969GHSA-3v49-2fcm-3rcj

Remote Code Execution (RCE) through Deserialization of Untrusted Data in Splunk MCP Server app

Published Aug 19, 2026 · Updated Aug 20, 2026 · Assigned by cisco

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

VendorProductAffectedFixed
Splunk Splunk MCP Server app 1.2 – < 1.2.1 1.2.1

References