MaunPrekshak — मौन प्रेक्षक

"The Silent Observer. Nothing hides from it."

MaunPrekshak (मौन = Silent, प्रेक्षक = Observer) is a fast, privacy-first Python security toolkit designed to catch vulnerabilities, exposed credentials, and insecure code patterns right in your terminal.

⚡ Highlights

• 🔍 Dependency Vulnerabilities (SCA): Real-time CVE discovery against OSV.dev across Python (poetry.lock, Pipfile.lock, uv.lock, requirements.txt, pyproject.toml, Pipfile), JavaScript/Node.js (package-lock.json, yarn.lock, pnpm-lock.yaml, package.json), Go modules (go.sum, go.mod), and Rust crates (Cargo.lock, Cargo.toml) for deep transitive dependency tracking. CI fails as soon as any finding meets the selected severity threshold.
• 🔑 Entropy & Regex Secrets Detection: 40+ high-precision regex detectors (including OpenAI sk-proj-, Anthropic sk-ant-, HuggingFace hf_, GitLab glpat-, GitHub Fine-Grained PAT github_pat_, Discord, HashiCorp Vault, AWS, Stripe) PLUS Shannon entropy token analysis ($H \ge 4.5$ Base64 / $H \ge 3.0$ Hex) for un-prefixed tokens and private keys, with zero false-positives for UUIDs, URLs, and dummy values.
• 🛡️ Static Code Analysis (SAST): 30 AST security rules (MP001–MP030) covering code execution, SQL injection, disabled SSL/TLS verification, wildcard network binding (0.0.0.0), insecure /tmp file creation, unsafe deserialization, paramiko AutoAddPolicy SSH MitM, unverified JWT decoding, world-writable chmod permissions, legacy XML XXE parsers, tarfile Zip Slip (CVE-2007-4559), urllib SSRF, ECB cipher modes, dill bytecode execution, Jinja2/Mako SSTI, pandas.read_pickle code execution, missing secure cookie flags, and hardcoded cryptographic IV/salt.
• ⚡ Git Staged, Diff & Baseline Scanning: Fast pre-commit mode via --staged, diff checks via --diff, and legacy debt suppression via --baseline.
• 🎨 Rich Terminal & SARIF Export: Formatted console output with risk gauges, and standard OASIS SARIF 2.1.0, JSON, or Markdown export.
• 🔒 100% Privacy & Local-First: Scans run entirely on your local CPU. Your source code never leaves your machine.
• 🤖 Optional AI Remediation: Plug in your Google Gemini API key for instant root-cause analysis and remediation steps.

🚀 Quick Start

Installation

pip install maunprekshak

🐧 Linux (1-Line Standalone Install — No Python Required)

curl -sSL https://raw.githubusercontent.com/PramanKasliwal/maunprekshak/main/install.sh | bash

🪟 Windows (1-Line PowerShell Install — Configures PATH Automatically)

irm https://raw.githubusercontent.com/PramanKasliwal/maunprekshak/main/install.ps1 | iex

🐍 Via PyPI (Any OS)

pip install maunprekshak
# or using pipx (recommended for Windows & Ubuntu 24.04+)
pipx install maunprekshak
pipx ensurepath

Windows Tip: If mp is not recognized after a standard pip install, run directly via the Python module:

python -m maunprekshak scan .
# or using py launcher
py -m maunprekshak scan .

Or permanently add Python's Scripts\ folder to your user PATH via PowerShell:

$scriptsDir = python -c "import sysconfig; print(sysconfig.get_path('scripts'))"
[Environment]::SetEnvironmentVariable("PATH", "$([Environment]::GetEnvironmentVariable('PATH', 'User'));$scriptsDir", "User")

Basic Scan

Scan the current directory:

mp scan .

Fast Scan without AI (No API Key Required)

mp scan . --no-ai

Export Results to SARIF, SBOM, JSON, or Markdown

# Export standard OASIS SARIF 2.1.0 for GitHub Code Scanning
mp scan ./my-project --output sarif --output-file results.sarif

# Export OASIS CycloneDX 1.5 JSON SBOM
mp scan ./my-project --output cyclonedx --output-file bom.cdx.json

# Export Linux Foundation SPDX 2.3 JSON SBOM
mp scan ./my-project --output spdx --output-file bom.spdx.json

# Export as JSON for pipelines
mp scan ./my-project --output json > report.json

# Export formatted Markdown
mp scan ./my-project --output markdown > SECURITY.md

Safe Mechanical Auto-Fixing (--fix)

Automatically patch safe, deterministic anti-patterns without breaking application logic:

• MP012: yaml.load() -> yaml.safe_load()
• MP023: tar.extractall() -> tar.extractall(filter='data') (prevents Zip Slip)
• MP014: tempfile.mktemp() -> tempfile.NamedTemporaryFile().name

mp scan . --fix

Inline Code Suppression

Suppress specific false-positives or approved patterns directly in code comments:

# Suppress all findings on this line:
result = eval(user_input)  # maunprekshak: ignore
# or Bandit / flake8 compatible:
result = eval(user_input)  # nosec

# Suppress specific rule ID:
result = eval(user_input)  # maunprekshak: ignore[MP001]
result = eval(user_input)  # nosec: MP001

# Disable entire file for a rule at the top of the file:
# maunprekshak: disable-file[MP001]

CI/CD Mode (Exit with Non-Zero on Threshold Breach)

# Fail CI build if any CRITICAL issue is found
mp scan . --ci --fail-on critical

# Fail CI build on HIGH or CRITICAL issues
mp scan . --ci --fail-on high

# A single HIGH or CRITICAL finding is enough to fail; the risk score remains informational

🐙 GitHub Actions & Code Scanning (SARIF)

Run MaunPrekshak in your GitHub workflow and get native inline alerts in GitHub's Security ➔ Code Scanning tab:

name: Security Scan

on: [push, pull_request]

jobs:
  maunprekshak:
    runs-on: ubuntu-latest
    permissions:
      security-events: write  # Needed for SARIF upload
      contents: read
    steps:
      - uses: actions/checkout@v4

      - name: Run MaunPrekshak Security Scan
        uses: PramanKasliwal/maunprekshak@v0.7.0
        with:
          fail-on: high
          output: sarif
          sarif-file: results.sarif

      - name: Upload to GitHub Code Scanning
        uses: github/codeql-action/upload-sarif@v3
        if: always()
        with:
          sarif_file: results.sarif

🪝 Native Git Pre-Commit Hook (1-Command Install)

Install MaunPrekshak directly into your repository's .git/hooks/pre-commit with a single command — no external dependencies needed:

# Install native pre-commit hook (automatically scans staged files before every commit)
mp hook install

# Uninstall hook and restore any previous backup
mp hook uninstall

Or using the standard .pre-commit-config.yaml framework:

repos:
  - repo: https://github.com/PramanKasliwal/maunprekshak
    rev: v0.7.0
    hooks:
      - id: maunprekshak
        args: ["--staged", "--fail-on", "high"]

⚙️ Configuration File (.maunprekshak.toml)

Generate a starter configuration file with:

mp init

Or customize .maunprekshak.toml (or [tool.maunprekshak] in pyproject.toml):

[scanner]
# Directories to exclude from scans
exclude = ["tests", "fixtures", ".venv", "node_modules"]

# Default CI failure threshold: "critical", "high", "medium", or "low"
fail_on = "high"

# Disable Gemini AI remediation (fully offline)
no_ai = false

# Ignore specific SAST check IDs
ignore_rules = ["MP010"]

🖥️ Sample Console Output

╭──────────────────────────────────────────────────────────────────────────────╮
│ Risk Level: HIGH (Score: 78)                                                 │
╰──────────────────────────────────────────────────────────────────────────────╯

┌──────────────────────────────────────────────────────────────────────────────┐
│                              Scan Summary                                    │
├──────────────┬──────────┬─────────┬────────┬───────┬────────────────────────┤
│ Module       │ CRITICAL │  HIGH   │ MEDIUM │  LOW  │ Total                  │
├──────────────┼──────────┼─────────┼────────┼───────┼────────────────────────┤
│ Dependencies │    1     │    2    │   0    │   0   │ 3 vulnerabilities      │
│ Secrets      │    1     │    1    │   0    │   0   │ 2 exposed credentials  │
│ SAST         │    0     │    3    │   4    │   1   │ 8 insecure patterns    │
└──────────────┴──────────┴─────────┴────────┴───────┴────────────────────────┘

Top Findings:
  [CRITICAL] CVE-2023-32681 — requests==2.25.1 (Fixed in 2.31.0)
  [HIGH]     AWS Access Key ID exposed in config.py:12
  [HIGH]     MP004: subprocess.run() called with shell=True in deploy.py:45

📖 CLI Command Reference

🤖 Bringing Your Own Gemini AI Key (Optional)

If you'd like AI-generated remediation summaries, set your Gemini API key in your environment or a .env file:

export GEMINI_API_KEY="AIzaSy..."
mp scan .

Get a free API key at Google AI Studio.

🤝 Contributing

We welcome community contributions! Please read our CONTRIBUTING.md to get started.

• Found a bug or missing a secret pattern? Open an Issue.
• Want to contribute a new SAST check? PRs are warmly welcomed!

🔒 Security Policy

We take security vulnerabilities seriously. Please review our SECURITY.md for details on supported versions and how to responsibly report vulnerabilities privately.

📄 License

Distributed under the Apache License 2.0. See LICENSE for details.

In ancient Sanskrit, मौन (Maun) signifies the all-knowing silence, and प्रेक्षक (Prekshak) is the ever-vigilant observer. MaunPrekshak protects your code quietly, thoroughly, and without compromise.