You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

vuln-checker
0.5.6a1

This version was deleted from PyPI around 2026-08-20. Installing fails with:
$ pip3 install vuln-checker==0.5.6a1 ERROR: Could not find a version that satisfies the requirement vuln-checker==0.5.6a1
View other deleted versions of vuln-checker

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2026-08-19/ \ vuln-checker==0.5.6a1
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
vuln_checker-0.5.6a1-py3-none-any.whl (168.2KB)
vuln_checker-0.5.6a1.tar.gz (162.4KB)