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CVE-2026-23744

Critical

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.

SeverityCritical
CVSS9.8
Exploit probability—
ProductMcpjam Inspector
PublishedJan 16, 2026
First seenJan 16, 2026
Weakness typeCWE-306Missing authentication for critical function

How to fix

Update
  • mcpjam inspector1.4.3 or later
  • @mcpjam/inspector1.4.3 or later

Affected products

ProductAffected versionsFixed in
mcpjam inspectorv < 1.4.31.4.3
@mcpjam/inspectornpmv < 1.4.31.4.3

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