Velonus – Open-source AppSec scanner that deduplicates SAST noise | Hacker News Reader

Velonus – Open-source AppSec scanner that deduplicates SAST noise

github.com

17 pointsAliAmmar157 comments

Hi HN, Im building Velonus. Developers are drowning in noisy security alerts, so I built an automated AppSec tool to clean up the output.

Right now, Phase 1 is an open-source CLI. It wraps standard static analysis tools (Semgrep, Bandit, pip-audit, Safety, and TruffleHog) and runs them in parallel using asyncio.

Instead of dealing with 5 different JSON formats, It maps everything to a unified finding schema with CWE and OWASP Top 10 tags, creates a deterministic hash for each finding, and deduplicates the noise. It outputs to a clean terminal UI or SARIF 2.1.0 for CI integration.

You can install it using (pip install velonus)

I'd love for you try it out on your messiest Python repos and let me know how the deduplication holds up. Happy to answer any technical questions about the architecture.

Installing collected packages: sortedcontainers, boolean.py, urllib3, typing-extensions, tqdm, tomlkit, tomli-w, tomli, tenacity, stevedore, shellingham, ruamel-yaml, regex, PyYAML, pyparsing, pygments, pycparser, platformdirs, pip-api, packaging, packageurl-python, msgpack, mdurl, marshmallow, MarkupSafe, license-expression, joblib, idna, h11, filelock, defusedxml, click, charset_normalizer, certifi, annotated-types, annotated-doc, typing-inspection, requests, pydantic-core, py-serializable, pip-requirements-parser, nltk, markdown-it-py, jinja2, httpcore, dparse, cffi, anyio, rich, pydantic, httpx, cyclonedx-python-lib, cryptography, CacheControl, typer, safety-schemas, joserfc, bandit, pip-audit, authlib, safety, velonus Successfully installed CacheControl-0.14.4 MarkupSafe-3.0.3 PyYAML-6.0.3 annotated-doc-0.0.4 annotated-types-0.7.0 anyio-4.13.0 authlib-1.7.2 bandit-1.9.4 boolean.py-5.0 certifi-2026.4.22 cffi-2.0.0 charset_normalizer-3.4.7 click-8.3.3 cryptography-48.0.0 cyclonedx-python-lib-11.7.0 defusedxml-0.7.1 dparse-0.6.4 filelock-3.29.0 h11-0.16.0 httpcore-1.0.9 httpx-0.28.1 idna-3.15 jinja2-3.1.6 joblib-1.5.3 joserfc-1.6.5 license-expression-30.4.4 markdown-it-py-4.2.0 marshmallow-4.3.0 mdurl-0.1.2 msgpack-1.1.2 nltk-3.9.4 packageurl-python-0.17.6 packaging-26.2 pip-api-0.0.34 pip-audit-2.10.0 pip-requirements-parser-32.0.1 platformdirs-4.9.6 py-serializable-2.1.0 pycparser-3.0 pydantic-2.13.4 pydantic-core-2.46.4 pygments-2.20.0 pyparsing-3.3.2 regex-2026.5.9 requests-2.34.2 rich-15.0.0 ruamel-yaml-0.19.1 safety-3.7.0 safety-schemas-0.0.16 shellingham-1.5.4 sortedcontainers-2.4.0 stevedore-5.7.0 tenacity-9.1.4 tomli-2.4.1 tomli-w-1.2.0 tomlkit-0.15.0 tqdm-4.67.3 typer-0.25.1 typing-extensions-4.15.0 typing-inspection-0.4.2 urllib3-2.7.0 velonus-1.0.0a1

(venv) $ velonus scan data

Traceback (most recent call last):

  File "~/venv/bin/velonus", line 5, in <module>

    from shield.main import app

  File "~/venv/lib/python3.12/site-packages/shield/main.py", line 15, in <module>

    from shield.commands import auth, config, scan

  File "~/venv/lib/python3.12/site-packages/shield/commands/scan.py", line 32, in <module>

    from scanner.pipeline import ScanPipeline

ModuleNotFoundError: No module named 'scanner'

Thank you for letting me know, it turns out its because the published distribution or pyproject didn't expose that package. I am looking into it right now thank you

should be fixed now :)

Confirming it was fixed and it worked well.

You can consider using Frame for the SAST part - https://github.com/lambdasec/frame

no i havent but ill definently look into it

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