Inspector
CVE-2026-23744
CRITICAL
GHSA-232v-j27c-5pp6
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessSend crafted HTTP request to MCPJam inspector
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ExploitTrigger MCP server installation
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ImpactExecute arbitrary code remotely
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication required for critical functions
MITRE ATT&CK
1 technique across 1 tactic: Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | MCPJam inspector versions 1.4.2 and earlier listening on 0.0.0.0 (default configuration) instead of 127.0.0.1, allowing remote HTTP access to the installation endpoint. |
| Impact | CVSS 9.8, EPSS 17.2% — very high exploitation probability. Developer tools are often exposed during testing, and MCP is a growing attack surface in the AI ecosystem. |
| Exploit ScenarioDerived | An attacker scans for exposed MCPJam Inspector instances (common on developer machines), accesses the unauthenticated API to invoke MCP tools, and achieves code execution on the developer's workstation, potentially compromising CI/CD pipelines. |
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Alert meAnalysisAIv1 – Mar 12, 2026
MCPJam Inspector versions 1.4.2 and earlier allow unauthenticated remote code execution through missing authentication in the MCP server debugging platform, with EPSS 17.2% indicating active scanning.
Earlier versions of this analysis (1)
Unauthenticated RCE in MCPJam Inspector MCP development platform — high exploitation probability.
RemediationAI
Update MCPJam Inspector. Bind the service to localhost only. Never expose development tools to the network.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in npm
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
MCPJam Inspector, a local development platform for MCP servers, lacks authentication on critical endpoints (CWE-306). This allows remote attackers to interact with MCP server functionality without credentials, leading to code execution.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
2DescriptionGitHub Advisory
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.
Executive ViewAI
Organizations using MCPJam inspector face critical risk from CVE-2026-23744, a missing authentication vulnerability rated CVSS 9.8. Attackers could bypass security controls to gain unauthorized access to protected resources and sensitive data. With an EPSS score of 17%, exploitation is likely in exposed deployments. Organizations should apply vendor updates immediately when available and implement compensating controls in the interim.
Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls; (2) Enable MFA where possible; (3) Monitor authentication logs for anomalous access.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Exploit-DB
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Affected Products (CPE)GitHub Advisory
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A security vulnerability exists in the Zingbox Inspector versions 1.293 and earlier, that could allow an attacker to sup
A security vulnerability exists in the Zingbox Inspector versions 1.294 and earlier, that could allow an attacker to sup
An SQL injection vulnerability exists in the management interface of Zingbox Inspector versions 1.288 and earlier, that
A command injection vulnerability exists in the Zingbox Inspector versions 1.286 and earlier, that allows for an authent
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A security vulnerability exists in Zingbox Inspector versions 1.294 and earlier, that results in passwords for 3rd party
A security vulnerability exists in Zingbox Inspector versions 1.294 and earlier, that allows for the Inspector to be sus