Security: requesting a private channel to report a critical vulnerability (no details here)

Hi maintainers 👋

I've identified what I assess as a **critical-severity security vulnerability** in BitFun, reproduced against the current `main` branch.

I'm **intentionally withholding all technical details here** — no affected file, component, mechanism, or proof-of-concept — because publicly disclosing an unpatched issue would put current users at risk. This follows the project's own `SECURITY.md` / coordinated-disclosure policy.

I already have a complete report ready to share **privately**, including:

- Root-cause analysis and the exact location
- A working, self-contained proof-of-concept
- CVSS 3.1 scoring
- A proposed patch (diff) plus a regression test

**What I need to proceed: a private channel.** Right now the repo's `/security/advisories/new` link isn't usable by non-maintainers because **Private Vulnerability Reporting appears to be disabled**. Please do one of:

1. **Enable Private Vulnerability Reporting** — repo **Settings → Code security and analysis → Private vulnerability reporting → Enable**. I'll then submit the full report through GitHub Security Advisories; or
2. Reply with a **private security contact** (e.g. a security email) I can send the report to.

Once a private channel is open I'll hand over everything immediately, and I'm happy to coordinate a disclosure timeline after you've had a chance to review and patch.

Flagging as high priority given the severity. Thanks for building BitFun! 🙏

Start with the repository's SECURITY.md and the GitHub Security Advisories private-reporting entry point mentioned in the issue. The issue is complete when a private channel is enabled or a private security contact is provided so the withheld vulnerability report, proof of concept, proposed patch, and regression test can be shared.

索引モデルが issue の本文から書いたものです。