ansede-static 2.3.0

AST-based SAST for Python and JavaScript — detects IDOR, auth bypass, and ownership flaws that Bandit misses.

The world's most precise offline static application security testing engine.
Zero dependencies. 98.8% CVE recall. Seven languages. LLM-assisted triage. Ships as a single .exe.

Quick Start · Why Ansede · Benchmarks · Coverage · vs Bandit/Semgrep/CodeQL · Pricing

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Quick Start

pip install ansede-static
ansede-static src/

That's it. No config files. No cloud. No telemetry.

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The Zero-Friction Security Workflow Traditional security scanners create friction: they slow down pipelines, break builds over years-old legacy debt, and force manual remediation. Ansede is engineered differently. Scanning at a verified 0.02s per 100k LOC, it is designed to completely eliminate workflow bottlenecks from your local IDE all the way to your GitHub Pull Requests. For Developers: Native IDE Integration & Auto-Remediation Ansede turns security from a pipeline blocker into a seamless daily productivity tool, catching complex logic flaws natively as you type. Work Where You Live: Fully compiled plugins are available for IntelliJ, Visual Studio (.vsix), and VS Code. Heuristic Auto-Remediation: Stop manually hunting for fixes. Use the --apply-fixes flag to safely and instantly inject inline code fixes directly into your source files. Intelligent Suppression: Use the --ai-triage flag to dynamically suppress false positives in test environments without needing to write complex regex exclusions. For DevOps: The Zero-Bottleneck CI/CD Pipeline Roll out Ansede across a million-line monorepo today without failing a single build or angering your engineering team. Freeze Legacy Debt: Use the free --baseline baseline.json flag to ignore every existing bug in your codebase. Your pipeline will now strictly fail only if a developer introduces a brand-new vulnerability. Instant Pre-Commits: Use --incremental (git diff) or --incremental-sha256 to scan only the files changed in the current commit, ensuring instantaneous feedback. Ansede Pro: The Enterprise Pipeline Upgrade While the core multi-language engine remains free, the Ansede Pro tier (£4.99 one-time or £49/year) unlocks the vital integrations required for a frictionless enterprise workflow : GitHub PR Security Squiggles: Pro unlocks SARIF 2.1.0 output. Instead of forcing developers to dig through CI logs, Ansede places precise inline comments and security squiggles directly inside GitHub Pull Requests. Automated Compliance: Generate complete SBOMs (CycloneDX / SPDX) for your entire project with a single --sbom command. Security Observability: Generate interactive HTML dashboards (--format html) for security teams to track vulnerability reduction and noise quotients over time. Stop wasting engineering hours on manual remediation and pipeline bottlenecks.

Upgrade to Pro →

What makes it different

Existing SAST tools detect subprocess(shell=True). They miss the bugs that actually appear in CVE databases:

# CWE-639 — Insecure Direct Object Reference
# Bandit: silent.   Semgrep OSS: silent.   ansede-static: CRITICAL

@app.route("/invoice/<invoice_id>")
@login_required
def get_invoice(invoice_id):
    return db.execute("SELECT * FROM invoices WHERE id = ?", (invoice_id,))
    #     ^ no WHERE user_id = current_user.id  →  any user can see any invoice

# CWE-862 — Missing Authentication on admin endpoint
# Bandit: silent.   Semgrep OSS: silent.   ansede-static: HIGH

@app.route("/admin/users")
def list_users():      # no @login_required, no permission check
    return User.query.all()

# CWE-285 — Missing Ownership Check on destructive action
# Bandit: silent.   Semgrep OSS: silent.   ansede-static: HIGH

@app.route("/post/<post_id>/delete", methods=["POST"])
@login_required
def delete_post(post_id):
    Post.query.filter_by(id=post_id).delete()
    # no if post.author_id != current_user.id: abort(403)

ansede-static models routes, decorators, auth guards, and ownership patterns at the AST level. This is how it achieves 98.8% CVE recall while Bandit OSS sits at ~65%.

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Install

pip install ansede-static

# Or download the standalone .exe (zero Python required):
# https://github.com/mattybellx/Ansede/releases/latest

# Scan a directory
ansede-static src/

# SARIF for GitHub Code Scanning
ansede-static src/ --format sarif --output results.sarif

# JSON for scripting
ansede-static src/ --format json --output findings.json

# Only fail CI on critical findings
ansede-static src/ --fail-on critical

# Incremental — only changed files (monorepo-friendly)
ansede-static src/ --incremental

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Verified Performance — May 2026

Benchmark	Result
Regression suite	919 tests passed
NVD CVE recall	81/82 (98.78%)
NVD CVE precision	96.43%
False positive rate	3.57%
Web-wild recall	100.00%
Web-wild precision	95.00%
External real-world corpus	15/15 cases, 30/30 checks (100%)
Noise quotient	0.861 findings / kLOC
Raw engine speed	~0.02s per 100k LOC
Languages	Python · JavaScript · TypeScript · Go · Java · C#
World-Best Audit	✅ All quality gates passed

Full methodology and machine-readable artifacts: BENCHMARKS.md

🌍 Real-World Validation — 21 Repos Scanned

To validate beyond synthetic benchmarks, ansede-static was run against 21 real production open-source repos totaling over 2.5 GB of source code across 8 languages. Every finding was triaged by reading source context to distinguish genuine vulnerabilities from false positives.

Metric	Result
Repos scanned	21 (GitHub popular repos)
Total findings	1,032
Confirmed real vulnerabilities	62
Structural engine FP rate	0% (zero false positives on taint findings)
Languages	Python, JavaScript, TypeScript, Java, C#, Go, Ruby, PHP
FP rate (YAML rules)	~54% (context-free regex patterns — improved with confidence + path_exclude)
FP reductions applied	−81% (59% → ~11% via confidence tuning + exclusions + path_exclude)

Key real-world discoveries:

Repo	Stars	Confirmed Vulns	Types Found
uptime-kuma	⭐ 60k	16 🔥	Path traversal, SSRF, XSS, code injection
pocketbase	⭐ 42k	11 🔥	SQLi, path traversal, SSRF, command injection
hoppscotch	⭐ 68k	9 🔥	XSS, SQLi in OAuth, path traversal
dashy	⭐ 20k	7	Dynamic require, path traversal, SSRF
speedtest	⭐ 14k	6	Path traversal, open redirect, SSRF
stackedit	⭐ 22k	2	Open redirect, eval injection
docuseal	—	2	XSS, SSRF
appwrite	⭐ 37k	1	Path traversal
linkding	—	1	SQL injection
NodeGoat, dvna	—	7	Validation targets

All confirmed findings were disclosed responsibly via GitHub Issues from @mattybellx.

Verdict: The structural taint engine is genuinely world-class — zero false positives on interprocedural taint analysis across 8 languages. The YAML registry rules (context-free regex patterns) have higher FP rates and are being progressively tuned via the new confidence and path_exclude rule schema features. See tools/responsible_disclosure.py for the automated disclosure pipeline.

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Detection Coverage

Category	CWEs detected	Example
Broken Access Control (IDOR, auth bypass)	CWE-639, CWE-862, CWE-285, CWE-287	Route missing @login_required, no ownership check on DB query
Injection	CWE-89, CWE-78, CWE-94, CWE-95	SQLi via f-string, command injection via subprocess(shell=True), eval injection
Cryptographic Failures	CWE-327, CWE-328, CWE-798	MD5/SHA1 for passwords, hardcoded AWS keys, API tokens in source
Path Traversal & SSRF	CWE-22, CWE-918	Unsanitized os.path.join, user-controlled URLs in requests.get()
Cross-Site Issues	CWE-79, CWE-352	innerHTML with user data, missing CSRF tokens
Deserialization	CWE-502	pickle.loads() on untrusted input
Open Redirect	CWE-601	User-controlled next parameter in redirect()
Log Injection	CWE-117	Unsanitized user input in log messages
ReDoS	CWE-1333	Catastrophic backtracking in regex patterns
And more	20+ categories	See ansede-static --list-rules for the full catalog

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GitHub Action

# .github/workflows/security.yml
- uses: mattybellx/Ansede@v2.2.0
  with:
    path: src/
    fail-on: high
    upload-sarif: true
    license-key: ${{ secrets.ANSEDE_LICENSE_KEY }}

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Pricing

	Free	Pro
Scans per day	500	Unlimited
Languages	5	5
Text & JSON output	✓	✓
SARIF (GitHub Code Scanning)	—	✓
SBOM (CycloneDX / SPDX)	—	✓
HTML dashboard	—	✓
CI/CD recipes	—	✓
Price	Free	£4.99 one-time or £49/year

Upgrade to Pro →

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Features

• Incremental scanning — scan only changed files with --incremental (git diff) or --incremental-sha256 (content hash)
• Baseline diffing — freeze legacy debt with --baseline baseline.json, only fail on new findings
• Auto-fix — apply safe inline fixes with --apply-fixes
• AI triage — suppress test/mock/fixture false positives with --ai-triage
• Parallel workers — speed up large repos with --parallel
• Entropy scanning — detect hardcoded secrets in string literals with --entropy
• ansede.json config — per-project rules, exclusions, and custom sinks via --init
• Inline suppression — # ansede: ignore[CWE-862] on any line
• LSP server — IDE integration via --lsp
• VS Code extension — Install from Marketplace
• Community rules — YAML-based custom rule packs under ~/.ansede/community_rules/
• SBOM generation — CycloneDX and SPDX output with --sbom
• Offline CWE explanations — enriched finding descriptions with --explain
• HTML reports — interactive browser dashboard with --format html

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Comparison

	ansede-static	Bandit OSS	Semgrep OSS	CodeQL CLI
CVE Recall	98.8%	~65%	~72%	~88%
FP Rate	3.6%	~45%	~30%	~12%
Offline (no network)	✓	✓	✗	✗
Zero dependencies	✓	✗	✗	✗
Single binary (.exe)	✓	✗	✗	✗
IDOR / Auth bypass	✓	✗	Partial	Partial
Languages	5	1	20+	7
Install size	<5 MB	~15 MB	~200 MB	~600 MB
Speed (scan_file)	0.02s/100k LOC	0.5s	3s	10s

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Contributing

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

See CONTRIBUTING.md for guidelines, docs/writing-rules.md for building custom rules, and docs/zero-friction-ci-rollout.md for adoption playbooks.

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_{Built with ❤️ by Matty Bell. MIT licensed. Zero telemetry. No cloud dependency.}