Today, Immersive's Container 7 Research Team have released a lab covering a critical vulnerability in the popular MCPJam Inspector Tool
On January 16, 2026, advisories were released covering a critical vulnerability in MCPJam Inspector, the local-first development platform for MCP servers. The Latest version, 1.4.2 and earlier, is vulnerable to a remote code execution (RCE) vulnerability, a trivial yet highly impactful vulnerability that allows an attacker to send a crafted HTTP request that triggers the installation of an MCP server, leading to RCE.
What is this about?Model context protocol (MCP) has become more popular as a way to connect applications and services together that use AI, such as connecting tools to your OpenAI account, so the AI can help you work with the tool, perform tasks on your behalf, or work as webhooks between tools. MCPJam is an example of a tool that makes these processes easier and more convenient.
Why is this critical for you and your team?As AI adoption across industries and sectors rises, products and services have been released to help people interact with AI pipelines. With MCPJam and tools like it, you can test and develop MCP (model context protocol) servers, emulate deployments, and debug your workflow, making your entire MCP development pipeline much smoother.If you're using any tools like this, where you share you API keys and other sensitive data with the tool, you need to be cognisant of the risks that these tools carry, as many others are vulnerable to basic misconfigurations that can lead to serious impacts.
Who is the content for?
- Penetration Testers
- Security Analysts
- Incident Responders
Here is a link to the lab:
This application has no logging available at all, so no Defensive Variant of this lab
Immerser