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

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 /nuxtisland/... decodes and hashes attacker-controlled JSON body input with destr and ohash before validating the URL-resident hash. An unauthenticated POST...

CVE-2026-71321

Nuxt.js vulnerability CVE-2026-71321 affects the island rendering endpoint in Nuxt before fixed versions 3.21.10 and 4.5.1. An unauthenticated POST to POST /__nuxt_island/_.json with a large JSON body is fully read, parsed, then hashed using destr and ohash before URL-resident hash validation, ca...