CVE-2026-23744 PoC — REC in MCPJam inspector due to HTTP Endpoint exposes

Source

https://github.com/boroeurnprach/CVE-2026-23744-PoC

Associated Vulnerability

Title:REC in MCPJam inspector due to HTTP Endpoint exposes (CVE-2026-23744)
Description:MCPJam inspector is the local-first development platform for MCP servers. Versions 1.4.2 and earlier are vulnerable to remote code execution (RCE) vulnerability, which allows an attacker to send a crafted HTTP request that triggers the installation of an MCP server, leading to RCE. Since MCPJam inspector by default listens on 0.0.0.0 instead of 127.0.0.1, an attacker can trigger the RCE remotely via a simple HTTP request. Version 1.4.3 contains a patch.

Description

CVE-2026-23744 - Versions 1.4.2 and earlier of MCPJam inspector are vulnerable to remote code execution (RCE). Because the tool listens on 0.0.0.0 by default, an attacker can trigger the installation and execution of a malicious MCP server by sending a crafted HTTP request. Version 1.4.3 contains a patch for this issue.

File Snapshot

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