- Fix broken rate limiting: add registerFailedAttempt/resetAttempts calls
- Remove raw session token from exchange table; generate fresh token at redemption
- Fix TOCTOU race: atomic UPDATE...WHERE used=false for exchange redemption
- Delete exchange records immediately after redemption
- Change bcrypt.compareSync to async bcrypt.compare to prevent event loop blocking
- Fix IP extraction: prefer x-real-ip, fall back to last x-forwarded-for entry
- Restrict redirect URI scheme to http/https only
- Add Origin header CSRF check on login and session-login endpoints
- Remove admin auto-access bypass from checkHostAccess (deny-by-default for all)
- Revoke forward auth sessions when user status changes away from active
- Validate portal domain against registered forward-auth hosts to prevent phishing
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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