# Sast Lite

> >-

- **Type:** Skill
- **Install:** `agentstack add skill-novacode37-claude-security-skills-sast-lite`
- **Verified:** Pending review
- **Seller:** [NovaCode37](https://agentstack.voostack.com/s/novacode37)
- **Installs:** 0
- **Category:** [AI & ML](https://agentstack.voostack.com/c/ai-and-ml)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [NovaCode37](https://github.com/NovaCode37)
- **Source:** https://github.com/NovaCode37/claude-security-skills/tree/main/skills/sast-lite

## Install

```sh
agentstack add skill-novacode37-claude-security-skills-sast-lite
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# SAST Lite

An AST-based static analyzer for Python. Instead of fragile regex matching, it
parses each file into an abstract syntax tree and inspects how dangerous APIs
are actually called — so `subprocess.run(cmd, shell=True)` is flagged while
`subprocess.run(["ls"])` is not. **No third-party dependencies.**

## When to use this skill

- "Audit / security-review this Python code."
- "Run a SAST scan on the project."
- Reviewing a PR or untrusted snippet before running it.
- A pre-merge CI gate for security regressions.

## What it detects

| Rule | CWE | Severity |
|------|-----|----------|
| `eval()` / `exec()` on dynamic input | CWE-95 | critical/high |
| `os.system` / `subprocess(shell=True)` | CWE-78 | high |
| `pickle`/`marshal` deserialization | CWE-502 | high |
| `yaml.load` without SafeLoader | CWE-20 | high |
| SQL via f-string / concat / `.format` / `%` | CWE-89 | high |
| `requests(verify=False)` | CWE-295 | high |
| Hardcoded password/secret literal | CWE-798 | high |
| Weak hash (md5/sha1) | CWE-327 | medium |
| `tempfile.mktemp` | CWE-377 | medium |
| `Flask(debug=True)` | CWE-489 | medium |
| Jinja2 `autoescape=False` | CWE-79 | medium |
| `assert` used for a security check | CWE-617 | medium |

## How to run it

```bash
# Scan a directory
python skills/sast-lite/analyzer.py src/

# JSON for tooling / CI
python skills/sast-lite/analyzer.py . --json

# Only show high+ severity
python skills/sast-lite/analyzer.py . --min-severity high
```

**Exit codes:** `0` clean · `1` issues found · `2` usage/parse error — ready
for CI gating.

## Recommended workflow for Claude

1. Run with `--json` and parse the issue list.
2. For each issue, open `path:line` and confirm the data flow is genuinely
   attacker-controllable (the analyzer is intra-procedural, so it may flag
   patterns that are safe in context).
3. Propose a concrete fix per finding — e.g. parameterized queries for
   `py.sql-injection`, `yaml.safe_load` for `py.yaml-load`,
   list-form `subprocess` calls for `py.subprocess-shell`.
4. Summarize by severity and CWE.

## Limitations

This is a *lite* analyzer: single-file, no cross-function taint tracking. It is
designed for fast, high-signal triage — not a replacement for a full SAST
suite. Treat findings as leads to verify, not automatic verdicts.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [NovaCode37](https://github.com/NovaCode37)
- **Source:** [NovaCode37/claude-security-skills](https://github.com/NovaCode37/claude-security-skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** yes
- **Environment & secrets:** no
- **Dynamic code execution:** yes

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: flagged — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-novacode37-claude-security-skills-sast-lite
- Seller: https://agentstack.voostack.com/s/novacode37
- Browse the marketplace: https://agentstack.voostack.com/browse

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