TLDR: Misconfigured Deno, introduced in 2020, can lead to security vulnerabilities, performance issues, and unstable applications. Problems such as granting excessive permissions, improper module caching, or poorly managed dependency imports compromise the integrity and reliability of Deno applications. Proper configuration and adherence to best practices are essential for secure and efficient development with Deno.
https://en.wikipedia.org/wiki/Deno_(software)
One common issue with Deno misconfiguration is granting excessive permissions to scripts via the `–allow-*` flags. Unlike Node.js, Deno enforces a secure-by-default runtime, but improper use of these permissions can expose the application to unauthorized file access, network requests, or environment variable leaks. Another issue is neglecting to clear or manage module caches, which can result in outdated or insecure dependencies being used during execution. Misconfigured imports, such as relying on hardcoded or insecure URLs for external modules, also introduce risks of dependency hijacking.
To address these risks, developers should grant only the necessary permissions for each script and validate external dependencies before including them. Using tools like Deno lint and automated security scans helps ensure code and configurations meet security standards. Regularly updating the Deno runtime and leveraging features such as locking dependency versions with `deno.lock` ensures stability and minimizes vulnerabilities. Proper configuration practices enhance Deno's secure and performance-oriented architecture.