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How can I improve the security of DXT extensions to prevent malicious code?

2025-08-19 391
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Ways to improve the security of DXT extensions

DXT provides multiple layers of protection mechanisms:

  • integrity verification: Verify file integrity with SHA-256 cryptographic hashes
  • Sandbox operating environment: The MCP server runs in a restricted environment with execution permissions explicitly defined by manifest.json
  • Signature mechanism: Optional digital signature using the dxt sign command (supports PGP keys)
  • Fine-grained authority control: Configure directory whitelisting in the user_config section of manifest.json
  • Automatic update channel: Verify update packet signatures over a secure HTTPS connection to prevent man-in-the-middle attacks

Developers should strictly adhere to 1) the principle of least privilege, 2) explicitly configure allowed_directories, 3) regularly check for extensions using dxt verify, and 4) add signatures to releases.

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