August 28, 2021 Update:
Microsoft Security Response Center has provided an official statement regarding this vulnerability.
Please follow this link: https://msrc-blog.microsoft.com/2021/08/27/update-on-vulnerability-in-the-azure-cosmos-db-jupyter-notebook-feature/
On August 26th, Reuters published a story in which they stated that Microsoft had contacted its customers to alert them to a potential vulnerability in Azure Cosmos DB, specifically a chain of vulnerabilities in the Jupyter Notebook feature of Cosmos DB.