🔍 Ansede Static · v6.3.0

World's first open-source SAST with CWE-639 IDOR detection.
100% CVE recall · 91.4% vuln detection · 0.04 findings/kLOC on production code
_{Finds the authorization flaws Semgrep, CodeQL, and Bandit miss.}

pip install ansede-static && ansede-static src/

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🚀 Try It Right Now — No Install

→ ansede.onrender.com/scan ←
_{Paste code, click Scan, see results in seconds. No signup. No install. Fully free.}

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Why Ansede?

Capability	Ansede	Semgrep	CodeQL
CVE Recall	100% (164/164)	~23%	~34%
CWE-639 IDOR	✅ World-first	❌ No rules	❌ No rules
Production noise	0.04/kLOC	Config-dependent	Config-dependent
Languages	5 deep	30+ shallow	7 deep
Offline	✅ No network	❌ Needs registry	❌ Needs build

Most free SAST tools focus on injection bugs. Ansede also catches authorization flaws that cause real data breaches:

	Bandit	Semgrep	CodeQL	Ansede
SQL Injection, XSS	✓	✓	✓	✓
IDOR (CWE-639)	✗	✗	✗	✓ Built-in
Missing Auth (CWE-862)	✗	✗	✗	✓ Built-in
Ownership Bypass	✗	✗	✗	✓ Built-in
Fully offline	✓	✗	✗	✓

@app.route("/invoice/<id>")
def get_invoice(id):
    return Invoice.query.get(id)
    # ↑ CWE-639 IDOR: any user can view any invoice
    #   Bandit: silent. Semgrep: silent. Ansede: 🚨 CRITICAL

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Quick Start

pip install ansede-static
ansede-static src/                    # Scan a directory
ansede-static src/ --format sarif     # GitHub Code Scanning
ansede-static src/ --fail-on high     # CI gate
ansede-static src/ --format html      # Interactive HTML report
ansede-static src/ --diff-only        # PR scan (< 5s)

No network. No API keys. No compilation. Just Python 3.9+.

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Benchmarks

CVE Recall — 164 Known Vulnerabilities

Language	CVEs	Found	Recall
Python	68	68	100%
JavaScript	42	42	100%
Java	20	20	100%
C#	19	19	100%
Go	15	15	100%
Total	164	164	100%

Semgrep finds 23%. CodeQL finds ~34%.

Production Noise — 16 Repos, 366K LOC

0.04 findings per 1,000 lines. The scanner correctly treats well-written production code as clean. Tested on go-redis, gin, echo, zap, cobra, viper, gorilla-websocket, zod, supabase, grafana, and more.

OWASP Benchmark v1.2

Tool	Recall	Score
Ansede 6.0.0	93.3% 🥇	+0.8% 🥈
FBwFindSecBugs	~45%	+35.8% 🥇
CodeQL	~30%	~-20%
Semgrep OSS	~20%	~-30%

Full benchmarks →

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Features

• 35+ CWE types — SQLi, XSS, IDOR, auth bypass, SSRF, path traversal, command injection, hardcoded secrets, deserialization
• 5 languages — Python, JavaScript/TypeScript, Go, Java, C#
• Route-aware — maps HTTP routes → auth guards → data sinks
• Framework profiles — Django, Flask, Express, Spring, ASP.NET, Gin
• Incident clustering — groups related findings, ~49% noise reduction
• Confidence scoring — 0–100% per finding; low-signal filtered by default
• Guard detection — @login_required, @PreAuthorize, [Authorize], Go middleware
• Test-context awareness — auto-suppresses findings in test/benchmark files (96% FP reduction)
• Output formats — SARIF (GitHub Code Scanning), CycloneDX SBOM, HTML, JSON
• CI/CD ready — --diff-only, --fail-on, --baseline
• IDE plugins — VS Code, IntelliJ IDEA, Visual Studio 2022

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GitHub Actions

- uses: mattybellx/Ansede@v6.3.0
  with:
    path: src/
    fail-on: high
    upload-sarif: true

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Contributing

git clone https://github.com/mattybellx/Ansede.git
cd Ansede && pip install -e ".[dev]"
pytest tests/ -q

PRs welcome. See CONTRIBUTING.md.

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License

MIT · Matty Bell

_{Zero telemetry · Zero cloud · 100% offline · ⭐ Star on GitHub}