cohort-htb

Cohort — HTB writeup & exploit chain Machine Cohort HackTheBox. Full kill chain: 1. SSRF in the Flask API /api/validate → internal vhost discovery 2. Pre-auth RCE in Marimo 0.20.4 WebSocket terminal CVE-2026-39987 → shell as marimo 3. Privilege escalation via PackageKit 1.2.8 D-Bus TOCTOU...