Threat database

CVE-2026-23744 is a critical remote code execution vulnerability in MCPJam inspector versions 1.4.2 and earlier. The flaw arises because the application listens on all network interfaces (0.0.0.0) by default and lacks authentication for a critical function that installs an MCP server. An attacker can exploit this by sending a crafted HTTP request remotely, triggering server installation and arbitrary code execution without any user interaction or privileges. The vulnerability has a CVSS score of 9.8, indicating a severe risk to confidentiality, integrity, and availability.

The MCP inspector is a developer tool for testing and debugging MCP servers. Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.