Bulletin ID: 2026-125-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 10/02/2026 13:00 PM PDT Description: Amazon SageMaker Unified Studio is an AWS service that unifies data, analytics, and AI development. It lets you find and access your organization's data and act on it with integrated, purpose-built tools. We identified CVE-2026-104019, an issue with the startup of SageMaker Spaces in SageMaker Unified Studio. The startup script in a SageMaker Space performs a network validation against all the available SageMaker connections in a project. Under certain conditions, improper sanitization of connection details during this validation could allow arbitrary code