by Kastro
Paper/Archive/CVE-2026-23744

CVE-2026-23744

MCPJam inspector — REC in MCPJam inspector due to HTTP Endpoint exposes

EPSS 68%public exploitCVSS 9.8
critical.is priorityof 100
59
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 99.3.993 × 2019.9Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
inspector<= 1.4.2–CNA

Scores by source

GitHub_M (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

refgithub.com/MCPJam/inspector/security/advisories/GHSA-232v-j27c-5pp6refgithub.com/MCPJam/inspector/commit/e6b9cf9d9e6c9cbec31493b1bdca3a1255fe3e7a