Supported Blackcoin versions are listed in the repository release notes. This V30 branch is pre-release validation code until public network activation is announced.

Report security issues privately through the GitHub repository security advisory flow when available:

https://github.com/Blackcoin-Dev/Blackcoin/security/advisories

If private advisories are unavailable, open a minimal public issue requesting a private contact path. Do not include exploit details, private keys, wallet contents, or transaction material in a public issue.