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🛡️ Sentinel: [CRITICAL] Fix hardcoded secrets and insecure CORS#27

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sentinel/fix-secrets-and-cors-11817250805623812944
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🛡️ Sentinel: [CRITICAL] Fix hardcoded secrets and insecure CORS#27
LVT-ENG wants to merge 3 commits intomainfrom
sentinel/fix-secrets-and-cors-11817250805623812944

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@LVT-ENG LVT-ENG commented Mar 23, 2026

This PR addresses a critical security vulnerability where the HMAC secret key was hardcoded in multiple backend files. It also resolves an insecure CORS configuration that allowed all origins.

Changes:

  1. Secret Externalization: Moved SECRET_KEY and CORS origins to environment variables using python-dotenv.
  2. Environment Template: Created .env.example to guide secure deployment setup.
  3. Repository Hygiene: Updated .gitignore to prevent committing compiled Python bytecode (__pycache__).
  4. Refactored Logic: Cleaned up redundant environment loading in DivineoBunker.py.
  5. Test Remediation: Updated and expanded the test suite in backend/tests/test_main.py to correctly verify authentication logic and AI engine fallback behavior.

Verification:

  • Ran export PYTHONPATH=$PYTHONPATH:$(pwd)/backend && python3 -m pytest backend/tests/ -> 3 Passed.
  • Ran npx vitest run -> 1 Passed.
  • Verified .env.example and .gitignore contents.

PR created automatically by Jules for task 11817250805623812944 started by @LVT-ENG

- Externalized LVT_SECRET_KEY and LVT_ALLOWED_ORIGINS to environment variables.
- Refactored DivineoBunker to remove redundant load_dotenv() calls.
- Updated .gitignore to exclude Python __pycache__ and other artifacts.
- Added .env.example with secure configuration guidelines.
- Fixed backend tests to correctly implement HMAC authentication.
- Initialized security journal in .jules/sentinel.md.

Co-authored-by: LVT-ENG <214667862+LVT-ENG@users.noreply.github.com>
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vercel bot commented Mar 23, 2026

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Summary of Changes

Hello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a critical security vulnerability by externalizing the HMAC secret key and securing the CORS configuration. It enhances the application's security posture and improves deployment practices by using environment variables and updating the .gitignore file. The test suite was also expanded to ensure the authentication and AI engine fallback mechanisms function correctly.

Highlights

  • Secret Externalization: The SECRET_KEY and CORS origins were moved to environment variables using python-dotenv to avoid hardcoding secrets.
  • CORS Configuration: The CORS configuration was updated to allow specific origins defined in the environment variables, enhancing security.
  • Test Suite Expansion: The test suite in backend/tests/test_main.py was updated and expanded to verify authentication logic and AI engine fallback behavior correctly.
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Code Review

This pull request effectively addresses critical security vulnerabilities by removing hardcoded secrets and configuring CORS securely. The use of environment variables, an .env.example file, and an updated .gitignore follows best practices. My review focuses on improving the robustness and clarity of the updated test suite. Specifically, I've pointed out an issue where the application silently handles an internal error, which could mask bugs, and I've suggested a way to make time-dependent tests more reliable.

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@LVT-ENG LVT-ENG left a comment

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Yes

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@LVT-ENG LVT-ENG left a comment

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Yes

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Yes

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
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LVT-ENG commented Mar 25, 2026

Yes

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Yes

Acknowledged. I have already implemented the fix for the hardcoded secrets and insecure CORS in the backend. I will now proceed to address the hardcoded password in the frontend as an additional security enhancement.

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Yes

…ecure CORS

- Externalized LVT_SECRET_KEY, STAFF_PASSWORD, and LVT_ALLOWED_ORIGINS to environment variables.
- Removed hardcoded password from frontend (js/main.js) and moved verification to backend (/api/verify-staff).
- Refactored DivineoBunker to remove redundant load_dotenv() and improve flexibility.
- Enhanced .gitignore to exclude Python artifacts (__pycache__, etc.).
- Updated .env.example with secure configuration guidelines.
- Fixed and expanded backend integration tests to verify security logic.
- Initialized security journal in .jules/sentinel.md.

Co-authored-by: LVT-ENG <214667862+LVT-ENG@users.noreply.github.com>
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