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CVE-2026-71321

CVE-2026-71321 · Nuxt: Unauthenticated CPU exhaustion parsing and hashing the Nuxt island endpoint body before hash validation

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Nuxt is an open-source web development framework for Vue.js. From 3.1.0 until 3.21.10 and 4.5.1, the internal island renderer endpoint `/__nuxt_island/...` decodes and hashes attacker-controlled JSON body input with destr and ohash before validating the URL-resident hash. An unauthenticated `POST /__nuxt_island/_.json` with a large JSON body is fully read, parsed, hashed, and then rejected, which wastes CPU on Nitro single event loop and delays concurrent requests. No valid hash and no authentication are required. This issue is fixed in 3.21.10 and 4.5.1.

CVSS 7.5 · High · EPSS 0.7% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • nuxt

    Versions
    • >= 4.0.0, < 4.5.1: Affected
    • >= 3.1.0, < 3.21.10: Affected

    No fix published

  • nuxt npm

    Affected ranges
    • SEMVER: ≥ 4.0.0, < 4.5.1

    Update to 4.5.1

  • nuxt npm

    Affected ranges
    • SEMVER: ≥ 3.1.0, < 3.21.10

    Update to 3.21.10

Original sources

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