CacheCat implements the following security measures:

1. No Dangerous Code Execution

   • No eval(), innerHTML, or Function() constructor
   • Safe JSON parsing with error handling

2. Message Security

   • Origin validation for all messages
   • Message type whitelist enforcement
   • Message structure validation

3. Input Validation

   • Key/value size limits (10KB keys, 10MB values)
   • Type checking for all inputs
   • Prevents DoS attacks

4. Content Security Policy

   • Restricts script sources to extension only
   • Prevents XSS attacks

5. Sender Validation

   • Cookie operations validate sender is from dashboard
   • Prevents unauthorized access

• ✅ 100% Local Operation - All data stays on your device
• ✅ No Data Collection - We don't collect any information
• ✅ No Data Transmission - Nothing is sent to external servers
• ✅ No Analytics - No tracking or analytics
• ✅ No Third-Party Services - No external API calls

All permissions are necessary for the extension to function:

• <all_urls>: Required to access storage on websites (only used when you click extension icon)
• cookies: Required for cookie management
• scripting: Required to inject scripts for storage access
• activeTab: Required to attach to websites
• alarms: Required to keep service worker active (ensures attachments persist, no data access)

• ✅ Manifest V3 compliance
• ✅ Strict mode in all scripts
• ✅ Error handling for all operations
• ✅ Request timeouts (30 seconds)
• ✅ No external dependencies

If you discover a security vulnerability, please do not open a public issue. Instead:

1. Email the maintainer or create a private security advisory on GitHub
2. Provide details about the vulnerability:
   • Description of the issue
   • Steps to reproduce
   • Potential impact
   • Suggested fix (if any)

We take security seriously and will respond promptly to all security reports.

GitHub Security Advisory: https://github.com/chinmay29hub/CacheCat/security/advisories/new

Status: Excellent ✅

The extension follows security best practices and is published on the Chrome Web Store.