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Vibe codingMediumvc-g515
Subject Ai code reviewLevel Mid–Senior~15 minCommon in Security interviewsIndustries Software development, Technology

Question

An AI agent generated this CDK (TypeScript) snippet to give a Lambda permission to read one config object from S3. A security review flags it. What's wrong and what's the minimal correct version?

ts
const fn = new lambda.Function(this, "ConfigReader", { /* ... */ }); fn.addToRolePolicy(new iam.PolicyStatement({  effect: iam.Effect.ALLOW,  actions: ["s3:*"],  resources: ["*"],}));
What a strong answer looks like

Treat the AI’s output as a draft to verify, not an answer to trust. Name the specific flaw and the input that triggers it, say how you’d catch it — tests, edge cases, reading critically — and how you’d re-prompt or decompose to get it right.

Learn the concepts
Describe your solution

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.