pip-guardian 1.0.1

Stops malicious PyPI packages before installation

pip-guardian

pip-guardian is a security gate in front of pip install to reduce PyPI supply-chain risk.

Why this exists

Package ecosystems are a common attack path. pip-guardian checks package metadata and distribution contents before install, then decides ALLOW, WARN, or BLOCK.

Feature set

1) Pre-install risk policy

• Version age rules:
  • block if version is very new (default < 5h)
  • warn if version is recent (default < 48h)
• Blocks yanked releases.
• Blocks known-compromised versions from local blocklist.
• Blocks maintainer identities from local blocklist.

2) Deep artifact scanning

• Downloads wheel/sdist artifacts from PyPI before install.
• Verifies artifact SHA256 against PyPI metadata.
• Static scan heuristics for:
  • executable .pth startup hooks
  • sitecustomize.py / usercustomize.py
  • obfuscated payload patterns (e.g., long base64 + dynamic execution)
  • credential-exfiltration-like behavior
  • persistence indicators (e.g., systemd artifacts)
  • Kubernetes lateral-movement indicators

3) Built-in incident guard (LiteLLM March 2026)

• Blocks:
  • litellm==1.82.7
  • litellm==1.82.8
• Runbook:
  • docs/INCIDENT_LITELLM_2026.md

4) CI-friendly JSON mode

• --json emits one machine-readable JSON object.
• --yes allows non-interactive proceed on WARN.
• Exit codes:
  • 0 install succeeded
  • 1 blocked, warn-not-confirmed, or pip install failure
  • 2 usage/argument errors

5) Logging

• Decision logs written as JSONL.
• Primary path: ~/.pip_guardian/guardian.log
• Fallback path (if home not writable): ./.pip_guardian/guardian.log

Installation

Install from PyPI:

python -m pip install pip-guardian

Upgrade:

python -m pip install --upgrade pip-guardian

CLI entrypoint fix

Earlier releases had CLI entrypoint issues for some users. This is now fixed.

Upgrade and try again:

python -m pip install --upgrade pip-guardian
pip-guardian install requests

Alternative commands that now work:

pip_guardian install requests
guardian install requests
python -m guardian install requests

Install from source (development):

git clone https://github.com/AnantDhavale/pip-guardian.git
cd pip-guardian
python -m pip install .

Usage

guardian install requests
guardian install litellm==1.82.8
guardian install fastapi --index-url https://pypi.org/simple
guardian install requests --json --yes

Policy and IOC files

• policies/config.yaml:
  • age thresholds
  • deep-scan score thresholds
  • executable .pth blocking toggle
• policies/blocklist.json:
  • package/version deny list
  • maintainer deny list

Repository structure

• guardian/cli.py - command entrypoint
• guardian/policy_engine.py - risk decision logic
• guardian/scanner.py - deep artifact scanning
• guardian/pypi_checker.py - PyPI metadata collection
• guardian/logger.py - local decision logging

Notes

• This reduces risk but is not a full malware sandbox.
• For production, use pinned dependencies and hash-locked installs.

Author

Anant Dhavale
[e-mail]

Reach out

If you are using it and finding it useful, please drop me a note. I would appreciate that ! [e-mail]

Check out homer-core. It's the governance middle-ware your enteprise needs, reach out for a free POC. wwww.homersemantics.com [e-mail]