[]()

Velonus

Security scanning for Python developers that actually tells you how to fix things.
One command. Five scanners. Zero noise.

pip install velonus
velonus scan ./your-project

Requires Python 3.10+

Demo

$ velonus scan ./myapp

  Scanning with 5 tools...

  secrets    ████████████████████  0.3s
  bandit     ████████████████████  2.1s
  semgrep    ████████████████████  4.2s
  pip-audit  ████████████████████  1.8s
  safety     ████████████████████  1.2s

 ┌──────────────┬──────────────────────────────────────────┬──────────────────┬──────────┐
 │ Severity     │ Finding                                  │ Location         │ Tool     │
 ├──────────────┼──────────────────────────────────────────┼──────────────────┼──────────┤
 │ 🔴 CRITICAL  │ Hardcoded AWS secret key                 │ config.py:14     │ secrets  │
 │ 🔴 CRITICAL  │ Hardcoded OpenAI API key                 │ llm_client.py:8  │ secrets  │
 │ 🔴 CRITICAL  │ SQL injection via string format          │ db/queries.py:41 │ semgrep  │
 │ 🟠 HIGH      │ Use of MD5 for password hashing          │ auth/utils.py:27 │ bandit   │
 │ 🟠 HIGH      │ requests 2.28.0 — CVE-2023-32681 (8.1)  │ requirements.txt │ pip-aud  │
 │ 🟡 MEDIUM    │ Shell injection via subprocess           │ runner.py:19     │ bandit   │
 │ 🟡 MEDIUM    │ Hardcoded JWT secret                     │ auth/tokens.py:3 │ secrets  │
 └──────────────┴──────────────────────────────────────────┴──────────────────┴──────────┘

  3 CRITICAL  │  7 HIGH  │  12 MEDIUM  │  34 LOW

What It Detects

All findings are normalized to a unified schema with CWE tags, OWASP Top 10 categories, and deterministic fingerprints for deduplication.

Output Formats

velonus scan ./                         # Rich terminal table (default)
velonus scan ./ --format json           # JSON array — pipe to jq, scripts, etc.
velonus scan ./ --sarif                 # Write SARIF to velonus-results.sarif
velonus scan ./ -o results/scan.sarif   # Write SARIF to a custom path
velonus scan ./ --severity high         # Filter to HIGH and CRITICAL only
velonus scan ./ --exclude tests/ --exclude migrations/  # Exclude paths
velonus scan ./ --verbose               # Per-tool timing + debug info

CI Integration

- name: Velonus security scan
  run: |
    pip install velonus
    velonus scan . --sarif -o velonus.sarif

- name: Upload to GitHub Security tab
  uses: github/codeql-action/upload-sarif@v4
  with:
    sarif_file: velonus.sarif

Velonus exits 1 on CRITICAL or HIGH findings — use it as a hard CI gate.

Roadmap

Alpha Notice

Velonus is in alpha. It works — we use it ourselves — and we want your feedback.
Expect rough edges. Report issues and we will fix them fast.

Contributing

See CONTRIBUTING.md for dev setup, test instructions, and PR guidelines.
Found a security issue? See SECURITY.md.
All contributions welcome — especially scanner improvements and false-positive reports.

License

MIT — see LICENSE.

Quick Start

1. Install

# Basic install (entropy-based secret detection)
pip install velonus

# Full install (with detect-secrets for better secret detection)
pip install velonus[detect-secrets]

# Include optional Semgrep patterns
pip install velonus[semgrep]

# All extras
pip install velonus[detect-secrets,semgrep]

2. Scan

# Scan current directory
velonus scan ./

# Scan with verbose output (shows per-tool timing)
velonus scan ./ --verbose

# Verify install
velonus --help

How to Use

Basic Scanning

# Scan the current directory (default)
velonus scan ./

# Scan a specific path
velonus scan ./src
velonus scan ./apps/backend

Filter by Severity

# Only show CRITICAL and HIGH findings (strict CI gate)
velonus scan ./ --severity high

# Only show MEDIUM and above
velonus scan ./ --severity medium

Exclude Paths

# Exclude specific directories
velonus scan ./ --exclude tests/ --exclude migrations/

# Exclude multiple patterns
velonus scan ./ --exclude "**/test_*.py" --exclude "venv/"

# By default, scans exclude: tests/, test_*/, */test_*.py, conftest.py

Output Formats

# Terminal table (default — Rich formatted)
velonus scan ./

# JSON output (pipe to jq, scripts, etc.)
velonus scan ./ --format json

# Write SARIF file (GitHub Security tab)
velonus scan ./ --sarif

# Write SARIF to custom path
velonus scan ./ -o results/scan.sarif

Verbose & Debug

# Show per-tool timing and execution details
velonus scan ./ --verbose

# Combine with JSON for structured debug output
velonus scan ./ --format json --verbose

What Gets Detected

Run a scan to see:

• Secrets: Hardcoded API keys, credentials, tokens, database strings
• SAST: SQL injection, unsafe subprocess calls, weak crypto
• Patterns: OWASP Top 10 vulnerability patterns
• Dependencies: Known CVEs in requirements (with CVSS scores)
• Vulnerabilities: Packages with publicly disclosed vulnerabilities

All findings include:

• CWE tags — reference to MITRE Common Weakness Enumeration
• OWASP Top 10 — categorization (e.g., A03:2021 for Injection)
• Deterministic fingerprints — same issue never scanned twice

CI/CD Integration

GitHub Actions

- name: Velonus security scan
  run: |
    pip install velonus[detect-secrets]
    velonus scan . --sarif -o velonus-results.sarif

- name: Upload to GitHub Security tab
  uses: github/codeql-action/upload-sarif@v4
  with:
    sarif_file: velonus-results.sarif

Velonus exits with code 1 on CRITICAL or HIGH findings — use as a hard gate.

Exit Codes

• 0: No critical/high findings
• 1: CRITICAL or HIGH findings detected (blocks merge)
• Other: Scan failed

Development Setup

For Contributors

# Install uv (Python package manager)
pip install uv

# Clone and setup
git clone https://github.com/AliAmmar15/Velonus.git
cd Velonus

# Install all workspace packages in dev mode
uv sync --all-extras --dev

# Activate virtual environment
source .venv/bin/activate        # macOS/Linux
.venv\Scripts\Activate.ps1       # Windows PowerShell

# Install CLI for testing
pip install -e apps/cli

Run Tests

# All tests
pytest apps/cli/tests/ -v

# Just secrets detector tests
pytest apps/cli/tests/test_secrets.py -v

# With coverage
pytest apps/cli/tests/ --cov=shield

Lint & Type Check

# Format code
ruff format apps/cli/ packages/

# Check formatting
ruff check apps/cli/ packages/

# Type check (strict mode)
mypy --strict apps/cli/shield/

Pre-commit Hook

# .pre-commit-config.yaml
repos:
  - repo: local
    hooks:
      - id: velonus
        name: Velonus security scan
        entry: velonus scan
        language: system
        pass_filenames: false
        args: ["./", "--severity", "high"]

Example Output

✓ Running secret detection...          [0.3s]
✓ Running Bandit...                    [2.1s]
✓ Running Semgrep...                   [4.2s]
✓ Running pip-audit...                 [1.8s]
✓ Running Safety...                    [1.2s]
──────────────────────────────────────────────
  3 CRITICAL  │  7 HIGH  │  12 MEDIUM  │  34 LOW

⚠ CRITICAL  Hardcoded AWS key detected
  → src/config.py:14
  CWE-798 · A07:2021

Tech Stack

• CLI — Python, Typer, Rich
• API — FastAPI, PostgreSQL, ARQ
• AI — Anthropic Claude (Sonnet for fixes, Haiku for triage)
• Scanners — Semgrep, Bandit, pip-audit, Safety
• Dashboard — Next.js, Tailwind, shadcn/ui
• Auth — Clerk
• Infra — Docker, Railway

Target Users

• Python developers and AI startups
• Small SaaS teams without a dedicated security team
• Engineers who want security that fits into their workflow

Contributing

Velonus is currently in private development. Contribution guidelines will be published when the CLI core is open sourced after Phase 5.

See CONTRIBUTING.md for setup instructions that apply today.