CVE-2026-23744
REC in MCPJam inspector due to HTTP Endpoint exposes
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.
INFO
Published Date :
Jan. 16, 2026, 8:15 p.m.
Last Modified :
June 17, 2026, 10:22 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update MCPJam inspector to version 1.4.3 or later.
- Configure MCPJam inspector to listen on 127.0.0.1.
- Restrict network access to the MCPJam inspector service.
Public PoC/Exploit Available at Github
CVE-2026-23744 has a 68 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-23744.
| URL | Resource |
|---|---|
| https://github.com/MCPJam/inspector/commit/e6b9cf9d9e6c9cbec31493b1bdca3a1255fe3e7a | Patch |
| https://github.com/MCPJam/inspector/security/advisories/GHSA-232v-j27c-5pp6 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-23744 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-23744
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Python
Exploit for MCPJam Inspector - Remote Code Execution (CVE-2026-23744)
Python
HackTheBox writeups
Hack The Box - DevHub Machine Walkthrough (Medium Linux, CVE-2026-23744, Chisel Tunneling, Jupyter, Root Privilege Escalation)
POC for CVE-2026-23744 for a python revshell
Python
None
this is place where stored my study about web security
Python PHP Dockerfile JavaScript EJS HTML CSS Rust Shell
A detailed writeUp on how I solved Hackthebox season 11 Machine- DevHub
None
Python
None
None
Python
HackTheBox machines & challenges: recon, custom exploits, privesc pipelines and writeups. Flags redacted per HTB ToS.
Python C Batchfile Shell HTML JavaScript PHP
CVE-2026-23744 Reverse shell
Python
cve-2026-23744 python exploit
Python
This Python proof-of-concept targets a vulnerable MCP (Model Context Protocol) service exposed by the target application. The vulnerability allows an attacker to supply arbitrary server configuration parameters through the /api/mcp/connect endpoint.
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-23744 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-23744 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'MCPJam', 'product': 'inspector', 'versions': [{'status': 'affected', 'version': '<= 1.4.2'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-23744', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-01-16T20:20:49.544463Z'} -
Initial Analysis by [email protected]
Mar. 13, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:mcpjam:inspector:*:*:*:*:*:*:*:* versions up to (excluding) 1.4.3 Added Reference Type GitHub, Inc.: https://github.com/MCPJam/inspector/commit/e6b9cf9d9e6c9cbec31493b1bdca3a1255fe3e7a Types: Patch Added Reference Type GitHub, Inc.: https://github.com/MCPJam/inspector/security/advisories/GHSA-232v-j27c-5pp6 Types: Exploit, Vendor Advisory -
CVE Modified by [email protected]
Jan. 16, 2026
Action Type Old Value New Value Changed 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. 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. Added Reference https://github.com/MCPJam/inspector/commit/e6b9cf9d9e6c9cbec31493b1bdca3a1255fe3e7a -
New CVE Received by [email protected]
Jan. 16, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-306 Added Reference https://github.com/MCPJam/inspector/security/advisories/GHSA-232v-j27c-5pp6