Please do not report security vulnerabilities through public GitHub issues.

Instead, please report them by opening a security advisory in the repository. To do this:

1. Navigate to the Security tab
2. Click on "Report a vulnerability"
3. Fill out the form with details about the vulnerability

Or, if you prefer private communication, please email the maintainers directly.

When reporting a vulnerability, please include:

• Type of vulnerability (e.g., XSS, SQL injection, authentication bypass, etc.)
• Location of the vulnerable code (file path, line number if possible)
• A detailed description of the vulnerability
• Steps to reproduce (if applicable)
• Potential impact
• Suggested fix (if you have one)

This project follows security best practices:

• All API endpoints require valid Cloudflare Access JWT authentication
• JWT validation occurs on every authenticated request
• User context extracted from Cloudflare Access tokens (email-based)
• Authorization delegated to Cloudflare Access policies

• No user data stored - all operations use Cloudflare R2 API directly
• File operations authenticated via Cloudflare Access
• Signed URLs for downloads use HMAC-SHA256
• Environment secrets managed via Wrangler and Cloudflare Workers secrets

• CORS headers properly configured
• R2 API calls use properly formatted requests
• Object keys handled correctly (no encoding issues on Management API)
• Rate limiting handled by Cloudflare infrastructure

• All dependencies regularly updated via Dependabot
• Automated security scanning via CodeQL
• Secrets scanning enabled to prevent credential leaks
• Supply chain security monitored

• TypeScript for type safety
• ESLint configuration enforced
• Automated linting on pull requests
• Code review process for all changes

We aim to:

• Acknowledge receipt of vulnerability reports within 48 hours
• Provide an initial assessment within 1 week
• Release a fix as soon as possible (timeline depends on severity)
• Notify reporters when the fix is released

Status: Documented & Acknowledged | Risk: Not Exploitable in This Context

Why This Is Not Exploitable:

R2 Bucket Manager's container does not:

• Process untrusted compressed data through zlib
• Accept arbitrary compressed input from users
• Use zlib for network protocol decompression

The zlib library is present in the Alpine base image but is not used in a way that exposes the vulnerability. This CVE requires an attacker to supply malicious compressed data, which is not possible in R2 Manager's architecture.

Mitigation:

• Monitoring for upstream fix from Alpine
• CVE is allowlisted in Docker security scan workflow
• Will be removed from allowlist when fix is available

• Subscribe to release notifications to stay informed about security updates
• Follow the project for security advisories
• Check this file regularly for updates to security practices

• This application requires Cloudflare Access (Zero Trust) for authentication
• If Access policies are misconfigured, unauthorized access may occur
• Ensure your Access policies are properly configured as documented in README.md

• The /site.webmanifest path bypasses Cloudflare Access to avoid CORS issues
• This is a design trade-off; this file is intended to be public
• Do not store sensitive information in static assets

• Use strong API tokens and secrets (never commit them)
• Use .env files for local development (included in .gitignore)
• Use wrangler secret put for production secrets
• Review environment variables before deployment

The application includes appropriate security headers:

• CORS headers for API endpoints
• Content-Type headers for proper content handling
• JWT validation on sensitive endpoints

This project uses:

• Dependabot for automatic dependency updates and security alerts
• CodeQL for static code analysis and vulnerability detection
• Secrets Scanning to prevent credential leaks
• Automated testing on pull requests

If you'd like to contribute security improvements:

1. Follow the CONTRIBUTING.md guidelines
2. Document security improvements clearly in your PR
3. Ensure all tests pass
4. Get approval from maintainers before merging

We appreciate security researchers who responsibly disclose vulnerabilities. Depending on the severity and impact, contributors may be recognized in:

• Security advisories
• Release notes
• Project documentation

Thank you for helping keep this project secure!