CVE-2026-23744

Name: CVE-2026-23744
Creator: NVD / NIST
Published: 2026-01-16T20:15:51.763+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 38.37%

Last modified Jun 17, 2026

CVE-2026-23744 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 38.37% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

38.37%

98.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-306

Affected Software

Vendor	Product	Versions
Mcpjam	Inspector	< 1.4.3

References

https://github.com/MCPJam/inspector/commit/e6b9cf9d9e6c9cbec31493b1bdca3a1255fe3e7aPatch
https://github.com/MCPJam/inspector/security/advisories/GHSA-232v-j27c-5pp6Exploit, Vendor Advisory

Timeline

Published: Jan 16, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-23744?

How severe is CVE-2026-23744?

CVE-2026-23744 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 38.37% probability of exploitation in the next 30 days.

How do I fix CVE-2026-23744?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-23744?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST