LengKundee/MQL5-Google-Onedrive
LengKundee/MQL5-Google-Onedrive
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MQL5-Google-Onedrive/.jules/sentinel.md
google-labs-jules[bot] 9b6778cba0 Fix CRITICAL authorization bypass in Telegram Bot 
- Changed `check_authorized` in `scripts/telegram_deploy_bot.py` to fail closed (deny all) if `TELEGRAM_ALLOWED_USER_IDS` is unset or empty.
- Updated `scripts/TELEGRAM_BOT_SETUP.md` and `QUICK_DEPLOY.md` to document that `TELEGRAM_ALLOWED_USER_IDS` is now mandatory for bot access.
- Added Sentinel Journal entry in `.jules/sentinel.md` documenting the vulnerability and learning.
- Verified fix with reproduction script.
2026-02-07 11:33:43 +00:00

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Sentinel's Journal

2026-02-07 - Telegram Bot Authorization Bypass

Vulnerability: The Telegram Deployment Bot (scripts/telegram_deploy_bot.py) contained a "Fail Open" vulnerability where omitting the TELEGRAM_ALLOWED_USER_IDS environment variable resulted in granting access to all Telegram users instead of none. Learning: Security controls must default to deny (Fail Closed). Implicitly allowing access when configuration is missing creates silent vulnerabilities that are hard to detect until exploited. Prevention: Ensure all authorization checks explicitly return False or throw an exception if the access control list is empty or undefined. Never default to True in security-critical paths.