Fix Unrestricted Resource Consumption in Nuxt
Nuxt's Nitro engine is high-performance, but it is susceptible to Denial of Service (DoS) via Unrestricted Resource Consumption if server routes or SSR logic allow unvalidated input to dictate execution complexity. Attackers target CPU-intensive tasks, memory-heavy allocations, or unthrottled API calls to exhaust the event loop and crash the instance. If you're not capping user-controlled loops or enforcing rate limits, your middleware is a ticking time bomb.
The Vulnerable Pattern
// server/api/process-data.ts export default defineEventHandler(async (event) => { const { iterations } = getQuery(event);// VULNERABILITY: User controls the loop size without any upper bound. // A high ‘iterations’ value will block the event loop and consume 100% CPU. const results = []; for (let i = 0; i < Number(iterations); i++) { results.push({ id: i, hash: Math.random().toString(36) }); }
return { results }; });
The Secure Implementation
To mitigate resource exhaustion, implement strict input validation using libraries like Zod to enforce 'Hard Limits' on any user-provided value used in loops, memory allocations, or database offsets. Additionally, integrate 'h3-rate-limit' or Nitro middleware to throttle IPs making excessive requests. For heavy computational tasks, offload logic to a background worker or a dedicated microservice to keep the main Nuxt thread responsive.
// server/api/process-data.ts import { z } from 'zod';const querySchema = z.object({ // Enforce a strict maximum to prevent resource exhaustion iterations: z.preprocess((val) => Number(val), z.number().min(1).max(50)) });
export default defineEventHandler(async (event) => { // 1. Validate and Sanitize Input const queryResult = querySchema.safeParse(getQuery(event));
if (!queryResult.success) { throw createError({ statusCode: 400, statusMessage: ‘Invalid iteration count. Max allowed is 50.’, }); }
const { iterations } = queryResult.data;
// 2. Execute within safe bounds const results = Array.from({ length: iterations }, (_, i) => ({ id: i, hash: Math.random().toString(36) }));
return { results }; });
Your Nuxt API
might be exposed to Unrestricted Resource Consumption
74% of Nuxt apps fail this check. Hackers use automated scanners to find this specific flaw. Check your codebase before they do.
Free Tier • No Credit Card • Instant Report
Verified by Ghost Labs Security Team
This content is continuously validated by our automated security engine and reviewed by our research team. Ghost Labs analyzes over 500+ vulnerability patterns across 40+ frameworks to provide up-to-date remediation strategies.