CVE-2026-23744

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

67.5% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-01-15 15:45 UTC ReservedThe CVE id was reserved by its CNA
2. 2026-01-16 20:15 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-06-17 10:22 UTC Last updatedMost recent change to the record

Details

Published

2026-01-16 20:15 UTC

Last modified

2026-06-17 10:22 UTC

Exploit probability

67.5% · EPSS, next 30 days

Weakness

CWE-306 · Missing authentication

Record status

Analyzed

Affected

• Mcpjam Inspector < 1.4.3

Attack profile CVSS 3.1 · 9.8

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High