CVE-2026-23744

CRITICAL EXPLOITED NUCLEI

MCPJam inspector < 1.4.3 - Remote Code Execution via HTTP Request

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2026-23744 has been observed exploited in the wild (reported by VulnCheck KEV). EIP tracks 49 public exploits from researchers including Diamorphine, ibreakthingsforaliving, ctzisme. A Nuclei detection template is also available.

AI-analyzed exploit summary This exploit targets CVE-2026-23744 in MCPJam Inspector <=1.4.2 by sending a crafted POST request to the `/api/mcp/connect` endpoint with a malicious `serverConfig` payload, triggering unauthenticated remote command execution via a reverse shell.

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.

Exploits (49)

exploitdb WORKING POC
by Diamorphine · pythonwebappsmultiple
https://www.exploit-db.com/exploits/52625

This exploit targets CVE-2026-23744 in MCPJam Inspector <=1.4.2 by sending a crafted POST request to the `/api/mcp/connect` endpoint with a malicious `serverConfig` payload, triggering unauthenticated remote command execution via a reverse shell.

Classification
Working Poc 98%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector <=1.4.2
No auth needed
Prerequisites: Network access to the target MCPJam Inspector instance · Attacker-controlled listener for the reverse shell
mistral-large-3 · analyzed Jul 08, 2026 Full analysis →
github WORKING POC 9 stars
by ibreakthingsforaliving · pythonpoc
https://github.com/ibreakthingsforaliving/CVE-2026-23744-PoC

The repository contains a functional Python exploit for CVE-2026-23744, targeting an HTTP endpoint in MCPJam inspector. The exploit sends a crafted JSON payload to execute arbitrary commands via the `/api/mcp/connect` endpoint.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam inspector (version not specified)
No auth needed
Prerequisites: Network access to target server on port 6274 · Target service must be running and accessible
mistral-large-3 · analyzed Jun 14, 2026 Full analysis →
nomisec WORKING POC 1 stars
by ctzisme · remote
https://github.com/ctzisme/CVE-2026-23744

This repository contains a functional Python exploit for CVE-2026-23744, which targets an RCE vulnerability in MCPJam inspector versions <= 1.4.2 via a crafted HTTP request to the /api/mcp/connect endpoint. The exploit sends a reverse shell payload to the target, demonstrating the vulnerability.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam inspector <= 1.4.2
No auth needed
Prerequisites: Python 3.8+ · requests library · listener set up for reverse shell
mistral-large-3 · analyzed Apr 09, 2026 Full analysis →
nomisec WORKING POC 1 stars
by boroeurnprach · remote
https://github.com/boroeurnprach/CVE-2026-23744-PoC

This repository contains a functional proof-of-concept exploit for CVE-2026-23744, targeting MCPJam inspector versions <= 1.4.2. The exploit sends a crafted HTTP request to trigger remote code execution by leveraging the vulnerable API endpoint `/api/mcp/connect`.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: @mcpjam/inspector <= 1.4.2
No auth needed
Prerequisites: Target running MCPJam inspector <= 1.4.2 · Network access to the target's port 6274
mistral-large-3 · analyzed Feb 16, 2026 Full analysis →
github WORKING POC
by nullRoot-Red · pythonremote
https://github.com/nullRoot-Red/CVE-2026-23744

This repository contains a functional Python exploit for CVE-2026-23744, an unauthenticated RCE vulnerability in MCjam Inspector (<=1.4.2). The exploit sends a crafted JSON payload to the exposed `/api/mcp/connect` endpoint, executing arbitrary commands via a base64-encoded reverse shell.

Classification
Working Poc 98%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: @mcpjam/inspector <=1.4.2
No auth needed
Prerequisites: Target must have MCjam Inspector running with default network binding (0.0.0.0) · Attacker must have network access to the exposed API endpoint · Python 3.x environment for running the exploit
mistral-large-3 · analyzed Jul 24, 2026 Full analysis →
github WORKING POC
by ALRAYZZ · pythonpoc
https://github.com/ALRAYZZ/CVE-Exploits/tree/main/exploits/CVE-2026-23744

This exploit targets CVE-2026-23744, a critical unauthenticated RCE vulnerability in MCPJam Inspector versions 1.4.2 and earlier. The exploit sends a crafted POST request to the `/api/mcp/connect` endpoint, injecting arbitrary commands via user-controlled `command` and `args` parameters, enabling reverse shell or direct command execution.

Classification
Working Poc 98%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector <= 1.4.2
No auth needed
Prerequisites: Network access to the target's MCPJam Inspector service (default port 3000) · Python 3.6+ with `requests` library installed
mistral-large-3 · analyzed Jul 21, 2026 Full analysis →
nomisec WORKING POC
by CerberusMrXi · remote
https://github.com/CerberusMrXi/CVE-2026-23744-MCPJam-Exploit

This repository contains a functional exploit for CVE-2026-23744, an unauthenticated remote code execution vulnerability in MCPJam Inspector versions <=1.4.2. The exploit leverages a command injection flaw in the `/api/mcp/connect` endpoint to execute arbitrary commands and establish reverse shells using multiple payload types.

Classification
Working Poc 98%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: MCPJam Inspector <=1.4.2
No auth needed
Prerequisites: Network access to the target MCPJam Inspector instance · Python 3.7+ environment with httpx library · Listener setup for reverse shell payloads
mistral-large-3 · analyzed Jul 15, 2026 Full analysis →
github WORKING POC
by ozcanpng · pythonremote
https://github.com/ozcanpng/CVE-2026-23744

This PoC exploits CVE-2026-23744, an unauthenticated remote code execution vulnerability in MCPJam Inspector <= 1.4.2. The exploit sends a crafted JSON payload to the `/api/mcp/connect` endpoint, leveraging a missing authentication flaw to execute arbitrary commands via the `serverConfig.command` and `serverConfig.args` parameters.

Classification
Working Poc 98%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector <= 1.4.2
No auth needed
Prerequisites: Network access to the MCPJam Inspector service (typically port 3000) · Target must be running a vulnerable version (<= 1.4.2)
mistral-large-3 · analyzed Jul 11, 2026 Full analysis →
github WORKING POC
by 0x77FSec · pythonremote
https://github.com/0x77FSec/CVE-2026-23744

This PoC exploits a command injection vulnerability (CVE-2026-23744) in a target API endpoint (/api/mcp/connect) by sending a crafted JSON payload that executes a base64-encoded reverse shell via /bin/bash. The exploit leverages improper input validation in the 'args' parameter to achieve remote code execution.

Classification
Working Poc 98%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Unspecified software with /api/mcp/connect endpoint (likely a management or connection proxy service)
No auth needed
Prerequisites: Network access to the target API endpoint · Listener (e.g., netcat) on the specified LHOST:LPORT · Target must have /bin/bash available
mistral-large-3 · analyzed Jul 10, 2026 Full analysis →
github WORKING POC
by SecureWithUmer · c++poc
https://github.com/SecureWithUmer/CVE-2026-PoCs/tree/main/2026/CVE-2026-23744

This PoC exploits a remote command injection vulnerability (CVE-2026-23744) in MCPJam Inspector <=1.4.2 by sending a crafted JSON payload to the `/api/mcp/connect` endpoint, allowing arbitrary command execution via base64-encoded reverse shell payloads.

Classification
Working Poc 98%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector <=1.4.2
No auth needed
Prerequisites: Network access to the target's `/api/mcp/connect` endpoint · Ability to receive reverse shell connections (for non-test mode)
mistral-large-3 · analyzed Jul 08, 2026 Full analysis →
github WORKING POC
by diamorphine666 · pythonremote
https://github.com/diamorphine666/CVE-2026-23744-exploit

This exploit targets CVE-2026-23744, a remote code execution vulnerability in MCPJam Inspector <=1.4.2. It sends a crafted POST request to the `/api/mcp/connect` endpoint with a malicious `serverConfig` payload that spawns a reverse shell to the attacker's machine using a bash TCP connection.

Classification
Working Poc 98%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector <=1.4.2
No auth needed
Prerequisites: Network access to the target MCPJam Inspector instance · Attacker-controlled machine with listener on specified port
mistral-large-3 · analyzed Jul 05, 2026 Full analysis →
nomisec WRITEUP
by timgad794 · remote
https://github.com/timgad794/DevHub-HTB-Walkthrough

This is a detailed walkthrough for exploiting CVE-2026-23744 on a Hack The Box machine, including steps for initial reconnaissance, reverse shell execution, privilege escalation via Jupyter and Flask API, and root access. It provides specific commands and techniques but does not include standalone exploit code.

Classification
Writeup 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: MCPJam Inspector v1.4.2
No auth needed
Prerequisites: Network access to target · Nmap for reconnaissance · Netcat for reverse shell · Chisel for tunneling
mistral-large-3 · analyzed Jun 28, 2026 Full analysis →
github WORKING POC
by daemoncibsec · pythonremote
https://github.com/daemoncibsec/mcpExec

This repository contains a functional Python exploit for CVE-2026-23744, targeting an RCE vulnerability in MCPJam Inspector. The exploit sends a crafted JSON payload to the `/api/mcp/connect` endpoint, triggering a reverse shell to a specified IP and port.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector
No auth needed
Prerequisites: Network access to the vulnerable MCPJam Inspector instance · Python 3 environment with `requests`, `rich`, and `argparse` libraries
mistral-large-3 · analyzed Jun 22, 2026 Full analysis →
github WORKING POC
by rohit-sundar · pythonremote
https://github.com/rohit-sundar/cve-2026-23744

The repository contains a functional exploit for CVE-2026-23744, an unauthenticated RCE vulnerability in MCPJam Inspector ≤ 1.4.2. The exploit sends a crafted JSON payload to the `/api/mcp/connect` endpoint, triggering arbitrary command execution via a reverse shell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector ≤ 1.4.2
No auth needed
Prerequisites: Network access to the target's port 6274 · A listener set up for the reverse shell
mistral-large-3 · analyzed Jun 14, 2026 Full analysis →
github WORKING POC
by kennedy-aikohi · pythonpoc
https://github.com/kennedy-aikohi/mcpjam-cve-2026-23744-validator

This repository contains a functional, bounded proof-of-concept validator for CVE-2026-23744, an unauthenticated remote command execution vulnerability in MCPJam Inspector. The tool executes a fixed evidence command to confirm vulnerability without providing a general-purpose exploit framework.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: MCPJam Inspector (versions up to and including 1.4.2)
No auth needed
Prerequisites: Network access to the target MCPJam Inspector endpoint · Explicit authorization to assess the target
mistral-large-3 · analyzed Jun 09, 2026 Full analysis →
github WORKING POC
by oryk0 · pythonremote
https://github.com/oryk0/CVE-2026-23744

The repository contains a functional Python script that exploits CVE-2026-23744 by sending a crafted JSON payload to the /api/mcp/connect endpoint, achieving Remote Code Execution (RCE) via command injection. The README provides a technical analysis of the vulnerability, including root cause details and exploitation mechanics.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector
No auth needed
Prerequisites: Network access to the target's /api/mcp/connect endpoint · Attacker-controlled IP and port for reverse shell
mistral-large-3 · analyzed Jun 06, 2026 Full analysis →
github WORKING POC
by keeieb79 · pythonremote
https://github.com/keeieb79/CVE-2026-23744-poc

The repository contains a functional Python exploit for CVE-2026-23744, targeting an RCE vulnerability in mcpJam v1.4.2 via the `/api/mcp/connect` endpoint. It uses Base64 encoding to bypass input validation and executes arbitrary commands through `/bin/bash`.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: mcpJam v1.4.2
No auth needed
Prerequisites: Python 3 · requests library · network access to target
mistral-large-3 · analyzed Jun 05, 2026 Full analysis →
github WORKING POC
by Dahalsamir · pythonremote
https://github.com/Dahalsamir/CVE-2026-23744-MCPJAM-RCE-exploit

This repository contains a functional Python exploit for CVE-2026-23744, targeting an RCE vulnerability in the MCP (Model Context Protocol) service via the /api/mcp/connect endpoint. The exploit sends a crafted JSON payload to execute arbitrary commands (e.g., a reverse shell) on the target system.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCP service (version not specified)
No auth needed
Prerequisites: Target MCP service exposed · Network connectivity to attacker-controlled IP/port
mistral-large-3 · analyzed Jun 05, 2026 Full analysis →
github WORKING POC
by avivyap · pythonremote
https://github.com/avivyap/CVE-2026-23744

This exploit targets CVE-2026-23744 by sending a crafted POST request to the '/api/mcp/connect' endpoint with a payload that executes a reverse shell via 'busybox nc'. The payload includes a command injection to establish a connection to an attacker-controlled IP and port.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Unknown (likely a web application with an exposed API endpoint)
No auth needed
Prerequisites: Target IP/URL · Attacker-controlled IP and port for reverse shell
mistral-large-3 · analyzed Jun 04, 2026 Full analysis →
github WORKING POC
by jf-gondim · pythonremote
https://github.com/jf-gondim/mcp-pwn

This repository contains a functional exploit for CVE-2026-23744, an unauthenticated remote code execution vulnerability in MCPJam MCP Proxy Inspector versions <= 1.4.2. The exploit leverages command injection via the `/api/mcp/connect` endpoint to spawn a reverse shell.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam MCP Proxy Inspector <= 1.4.2
No auth needed
Prerequisites: Network access to the target's MCPJam port (default: 3000) · A listener for the reverse shell callback
mistral-large-3 · analyzed Jun 03, 2026 Full analysis →
github STUB
by MrR0b0t19 · remote
https://github.com/MrR0b0t19/CVE-2026-23744-PoC

The repository contains only a minimal README with no exploit code, technical details, or functional proof-of-concept. It is a placeholder with no substantive content.

Classification
Stub 100%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: unknown
No auth needed
mistral-large-3 · analyzed Jun 03, 2026 Full analysis →
github WORKING POC
by TYehan · pythonpoc
https://github.com/TYehan/CVE-2026-23744

This repository contains a functional Python-based exploit for CVE-2026-23744, targeting MCPJam Inspector <= 1.4.2. The exploit leverages a command injection vulnerability in the `/api/mcp/connect` endpoint to achieve remote code execution via a reverse shell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector <= 1.4.2
No auth needed
Prerequisites: Python 3.7+ · network access to target · listener setup for reverse shell
mistral-large-3 · analyzed Jun 02, 2026 Full analysis →
github WORKING POC
by m2sousa · pythonremote
https://github.com/m2sousa/CVE-2026-23744

The repository contains a functional Python exploit for CVE-2026-23744, targeting an RCE vulnerability in MCPJam Inspector versions <= 1.4.2. The exploit sends a crafted HTTP request to trigger command execution via the `/api/mcp/connect` endpoint.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector <= 1.4.2
No auth needed
Prerequisites: Network access to the target's API endpoint · Python 3 with `requests` library
mistral-large-3 · analyzed Jun 02, 2026 Full analysis →
github WORKING POC
by alisster00 · pythonremote
https://github.com/alisster00/CVE-2026-23744-RCE

This repository contains a functional Python exploit for CVE-2026-23744, targeting an unauthenticated RCE vulnerability in MCPJam Inspector v1.4.2 via the `/api/mcp/connect` endpoint. The exploit sends a crafted JSON payload to execute a reverse shell command.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector v1.4.2
No auth needed
Prerequisites: Python 3.6+ · requests library · netcat/socat for listener
mistral-large-3 · analyzed Jun 02, 2026 Full analysis →
github WORKING POC
by afifudinmtop · pythonremote
https://github.com/afifudinmtop/MCPJam-Inspector-1.4.2-Remote-Code-Execution-CVE-2026-23744

This repository contains a functional Python exploit for CVE-2026-23744, targeting MCPJam Inspector 1.4.2. The exploit sends a crafted JSON payload to the `/api/mcp/connect` endpoint, triggering remote code execution via a reverse shell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector 1.4.2
No auth needed
Prerequisites: Attacker-controlled listener (e.g., netcat) · Network access to the target
mistral-large-3 · analyzed Jun 01, 2026 Full analysis →
github WORKING POC
by Least-Significant-Bit · pythonremote
https://github.com/Least-Significant-Bit/CVE-2026-23744

This repository contains a functional exploit PoC for CVE-2026-23744, which leverages a command injection vulnerability in a Node.js-based API endpoint to achieve remote code execution (RCE). The exploit sends a crafted payload via a POST request to spawn a reverse shell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Unknown (Node.js-based API with /api/mcp/connect endpoint)
No auth needed
Prerequisites: Attacker-controlled IP and port for reverse shell · Network access to the target API endpoint
mistral-large-3 · analyzed Jun 01, 2026 Full analysis →
github WORKING POC
by sbouabid-sec · pythonremote
https://github.com/sbouabid-sec/CVE-2026-23744-POC

The repository contains a functional Python exploit for CVE-2026-23744, targeting MCPJam Inspector <= 1.4.2. It exploits an unauthenticated RCE vulnerability via the `/api/mcp/connect` endpoint by sending a crafted JSON payload with reverse shell commands.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector <= 1.4.2
No auth needed
Prerequisites: Target URL · Listener IP · Listener port
mistral-large-3 · analyzed May 31, 2026 Full analysis →
nomisec WORKING POC
by SrGinebras · remote
https://github.com/SrGinebras/CVE-2026-23744-RCE-for-MCPjam-inspector-v1.4.2

The repository contains a functional Python exploit for CVE-2026-23744, targeting an RCE vulnerability in MCPJam Inspector <= 1.4.2 via unsanitized input in the /api/mcp/connect endpoint. The exploit sends a crafted POST request with a reverse shell payload to achieve arbitrary command execution.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector <= 1.4.2
No auth needed
Prerequisites: Target URL · Attacker IP · Attacker port
mistral-large-3 · analyzed May 31, 2026 Full analysis →
nomisec WORKING POC
by thisisish · remote
https://github.com/thisisish/HTB-DevHub

The repository contains a functional exploit for CVE-2026-23744, targeting an unauthenticated RCE vulnerability in MCPJam Inspector <= 1.4.2. The exploit sends a crafted JSON payload to /api/mcp/connect, which spawns a reverse shell via child_process.spawn. It includes a vulnerability check and supports both HTTP and HTTPS.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: MCPJam Inspector <= 1.4.2
No auth needed
Prerequisites: network access to target · listener setup for reverse shell
mistral-large-3 · analyzed May 31, 2026 Full analysis →
github WORKING POC
by p1ctur3p3rf3ct · pythonremote
https://github.com/p1ctur3p3rf3ct/CVE-2026-23744

The repository contains a functional Python script that exploits CVE-2026-23744 by sending a crafted POST request to the target's `/api/mcp/connect` endpoint, executing a reverse shell via `busybox nc`. The exploit leverages command injection through the `serverConfig` JSON payload.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Unknown (likely a web application with an API endpoint `/api/mcp/connect`)
No auth needed
Prerequisites: Target URL with vulnerable endpoint · Attacker-controlled LHOST and LPORT for reverse shell
mistral-large-3 · analyzed May 31, 2026 Full analysis →
github WORKING POC
by w3nch · pythonpoc
https://github.com/w3nch/CVE-2026-23744

This repository contains a functional exploit for CVE-2026-23744, targeting a remote command execution (RCE) vulnerability in a service running on port 6274. The exploit sends a crafted JSON payload to the '/api/mcp/connect' endpoint, allowing arbitrary command execution, including reverse shell payloads.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Unknown (service on port 6274)
No auth needed
Prerequisites: Target service running on port 6274 · Network connectivity to the target
mistral-large-3 · analyzed May 31, 2026 Full analysis →
github WORKING POC
by XZ1r0 · pythonpoc
https://github.com/XZ1r0/cve-2026-poc-collection/tree/main/web/CVE-2026-23744-PoC

The repository contains a functional Python exploit for CVE-2026-23744, targeting an HTTP endpoint in MCPJam inspector. The exploit sends a crafted JSON payload to execute arbitrary commands via the `/api/mcp/connect` endpoint.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: MCPJam inspector (version not specified)
No auth needed
Prerequisites: Target server running on port 6274 · Network access to the target
mistral-large-3 · analyzed May 21, 2026 Full analysis →
nomisec WRITEUP
by ledksv · poc
https://github.com/ledksv/kobold

This repository provides a detailed technical walkthrough of exploiting CVE-2026-23744 for unauthenticated RCE in MCPJam Inspector, followed by LFI in PrivateBin and Docker group privilege escalation to achieve root access. It includes step-by-step commands, attack chain analysis, and technical insights.

Classification
Writeup 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: MCPJam Inspector v1.4.2
No auth needed
Prerequisites: Network access to target · Python3 for exploit script · Docker image availability on target
mistral-large-3 · analyzed May 11, 2026 Full analysis →
nomisec WORKING POC
by luiskrnr · remote
https://github.com/luiskrnr/exploit-CVE-2026-23744

The repository contains a functional Python exploit for CVE-2026-23744, targeting MCPJam Inspector versions 1.4.2 and earlier. The exploit sends a crafted HTTP POST request to the '/api/mcp/connect' endpoint, allowing remote command execution due to the service listening on 0.0.0.0 instead of 127.0.0.1.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector <= 1.4.2
No auth needed
Prerequisites: Network access to the target service · Target service must be running and accessible
mistral-large-3 · analyzed Apr 10, 2026 Full analysis →
nomisec WORKING POC
by CyLock11 · remote
https://github.com/CyLock11/CVE-2026-23744

The repository contains a functional Python exploit for CVE-2026-23744, demonstrating unauthenticated remote code execution (RCE) via command injection in the `/api/mcp/connect` endpoint. The exploit sends a crafted JSON payload to execute a reverse shell, with clear instructions and technical details provided in the README.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCP Connect (version not specified)
No auth needed
Prerequisites: Python 3.x · requests library · termcolor library · network connectivity to target · listener setup for reverse shell
mistral-large-3 · analyzed Apr 09, 2026 Full analysis →
nomisec WORKING POC
by d0x-awrqxavc · poc
https://github.com/d0x-awrqxavc/CVE-2026-23744

This repository contains a functional exploit for CVE-2026-23744, targeting MCPJam Inspector <= 1.4.2. The exploit leverages unauthenticated RCE via the `/api/mcp/connect` endpoint and escalates privileges via Docker socket abuse to achieve a root reverse shell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: MCPJam Inspector <= 1.4.2
No auth needed
Prerequisites: Docker group access without password · Docker socket accessible
mistral-large-3 · analyzed Apr 23, 2026 Full analysis →
nomisec WORKING POC
by d0x-awrqxavc · local
https://github.com/d0x-awrqxavc/CVE-2026-23744-HACKTHEBOX

This repository contains a functional exploit for CVE-2026-23744, targeting MCPJam Inspector <= 1.4.2. The exploit leverages unauthenticated RCE via the `/api/mcp/connect` endpoint and escalates privileges using Docker socket abuse to achieve a root reverse shell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: MCPJam Inspector <= 1.4.2
No auth needed
Prerequisites: Docker socket accessible · Docker group accessible without password
mistral-large-3 · analyzed Apr 09, 2026 Full analysis →
nomisec WORKING POC
by d3vn0mi · remote
https://github.com/d3vn0mi/CVE-2026-23744-POC

This repository contains a functional Python exploit for CVE-2026-23744, an unauthenticated RCE vulnerability in MCP servers via the `/api/mcp/connect` endpoint. The exploit sends a crafted JSON payload to execute arbitrary commands without authentication.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCP-compatible servers (port 6274)
No auth needed
Prerequisites: Network access to the MCP server on port 6274
mistral-large-3 · analyzed Apr 09, 2026 Full analysis →
nomisec WORKING POC
by 0xg00se · remote
https://github.com/0xg00se/CVE-2026-23744-script

The repository contains a functional Python exploit for CVE-2026-23744, targeting MCPJam Inspector <=1.4.2. The exploit sends a crafted JSON payload to the /api/mcp/connect endpoint, triggering a reverse shell via a command injection vulnerability.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector <=1.4.2
No auth needed
Prerequisites: Target domain/vhost configured in /etc/hosts · Listener setup for reverse shell
mistral-large-3 · analyzed Apr 09, 2026 Full analysis →
nomisec WORKING POC
by fcjaviergarcia · remote
https://github.com/fcjaviergarcia/CVE-2026-23744-POC

This repository contains a functional exploit for CVE-2026-23744, which abuses an unauthenticated command injection vulnerability in MCPJam Inspector's /api/mcp/connect endpoint. The exploit sends a crafted JSON payload to execute arbitrary system commands via the 'command' and 'args' fields, demonstrating blind RCE.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector (version not specified)
No auth needed
Prerequisites: Network access to the target server · HTTPS connectivity (self-signed certificates are ignored)
mistral-large-3 · analyzed Apr 09, 2026 Full analysis →
nomisec WORKING POC
by AhmadF77 · remote
https://github.com/AhmadF77/CVE-2026-23744

The repository contains a functional Python script that exploits CVE-2026-23744, a remote code execution (RCE) vulnerability in MCPJam inspector versions 1.4.2 and earlier. The exploit sends a crafted HTTP request to trigger the installation of an MCP server, leading to RCE via a reverse shell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam inspector <= 1.4.2
No auth needed
Prerequisites: Target URL · Attacker-controlled IP for reverse shell
mistral-large-3 · analyzed Apr 09, 2026 Full analysis →
nomisec WORKING POC
by z4yd3 · remote
https://github.com/z4yd3/PoC-CVE-2026-23744

The repository contains a functional exploit for CVE-2026-23744, targeting an unauthenticated RCE vulnerability in MCPJam Inspector <= 1.4.2 via a crafted JSON payload to the /api/mcp/connect endpoint. The exploit establishes a reverse shell using bash.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector <= 1.4.2
No auth needed
Prerequisites: Network access to the target · Listener set up on attacker's machine
mistral-large-3 · analyzed Apr 09, 2026 Full analysis →
nomisec WORKING POC
by yassertioursi · remote
https://github.com/yassertioursi/htb-kobold-writeup

The repository contains a functional exploit for CVE-2026-23744, targeting MCPJam Inspector with an unauthenticated RCE via crafted POST requests to `/api/mcp/connect`. It includes a detailed writeup and a Python script demonstrating the vulnerability.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector ≤ 1.4.2
No auth needed
Prerequisites: network access to the target · attacker-controlled listener for reverse shell
mistral-large-3 · analyzed Apr 09, 2026 Full analysis →
nomisec WORKING POC
by InzegoSec · remote
https://github.com/InzegoSec/CVE-2026-23744

This repository contains a functional Python exploit for CVE-2026-23744, targeting MCPJam Inspector <=1.4.2. The exploit sends a crafted JSON payload to the target's API endpoint, executing a reverse shell or a test command via base64-encoded bash commands.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: MCPJam Inspector <=1.4.2
No auth needed
Prerequisites: Target URL · Attacker-controlled listening host and port
mistral-large-3 · analyzed Mar 25, 2026 Full analysis →
nomisec WORKING POC
by FrenzisRed · remote
https://github.com/FrenzisRed/CVE-2026-23744

The repository contains a functional Python script that exploits CVE-2026-23744, an RCE vulnerability in MCPJam Inspector. The exploit sends a crafted JSON payload to the target's API endpoint, triggering a reverse shell to the attacker's specified IP and port.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector (version not specified)
No auth needed
Prerequisites: Target URL · Attacker IP · Attacker port
mistral-large-3 · analyzed Mar 24, 2026 Full analysis →
nomisec WORKING POC
by fckoo · remote
https://github.com/fckoo/mcpjaminspector-unauth-rce

The repository contains a functional Python exploit for CVE-2026-23744, an unauthenticated RCE vulnerability in MCPJam Inspector <= 1.4.2. The exploit sends a crafted POST request to the `/api/mcp/connect` endpoint with a malicious `serverConfig` payload to execute arbitrary commands.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector <= 1.4.2
No auth needed
Prerequisites: Network access to the target · Target running MCPJam Inspector <= 1.4.2
mistral-large-3 · analyzed Mar 23, 2026 Full analysis →
nomisec WORKING POC
by H1sok444 · remote
https://github.com/H1sok444/CVE-2026-23744-PoC

This repository contains a functional Python exploit for CVE-2026-23744, targeting an MCP API endpoint (`/api/mcp/connect`) to achieve remote command execution via a reverse shell payload. The exploit sends a crafted JSON payload with a command injection vector, leveraging `busybox nc` for shell connectivity.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCP (specific version not specified)
No auth needed
Prerequisites: Python 3 · requests library · network connectivity to target · listener setup (netcat)
mistral-large-3 · analyzed Mar 22, 2026 Full analysis →
nomisec WORKING POC
by suljov · remote
https://github.com/suljov/CVE-2026-23744-Remote-Code-Execution-POC

The repository contains a functional exploit for CVE-2026-23744, targeting MCPJam inspector <= 1.4.2. The exploit sends a crafted HTTP POST request to the `/api/mcp/connect` endpoint, triggering remote code execution via a reverse shell payload using `busybox` and `nc`.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam inspector <= 1.4.2
No auth needed
Prerequisites: network access to the target interface · attacker-controlled listener (e.g., netcat)
mistral-large-3 · analyzed Mar 22, 2026 Full analysis →
nomisec WORKING POC
by rootdirective-sec · remote
https://github.com/rootdirective-sec/CVE-2026-23744-Lab

This repository provides a Docker-based lab environment to demonstrate CVE-2026-23744, a vulnerability in MCPJam Inspector where the vulnerable version (1.4.2) listens on all interfaces (0.0.0.0:6274), allowing remote exploitation, while the patched version (1.4.3) binds to loopback (127.0.0.1:6274). The included Python exploit script (`exploit.py`) sends a crafted POST request to the `/api/mcp/connect` endpoint to achieve remote command execution (RCE).

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: MCPJam Inspector versions 1.4.2 and earlier
No auth needed
Prerequisites: Docker and Docker Compose installed · Network access to the vulnerable MCPJam Inspector instance
mistral-large-3 · analyzed Feb 19, 2026 Full analysis →

Nuclei Templates (1)

MCPJam Inspector - Remote Code Execution
CRITICALVERIFIEDby Louay-075

Scores

CVSS v3 9.8
EPSS 0.4503
EPSS Percentile 98.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

VulnCheck KEV 2026-02-18
CWE
CWE-306
Status published
Products (2)
mcpjam/inspector < 1.4.3
mcpjam/inspector 0 - 1.4.3npm
Published Jan 16, 2026
Tracked Since Feb 18, 2026