CVE-2026-46342
Nuxt: `__nuxt_island` endpoint does not bind responses to request props, enabling shared-cache poisoning
Nuxt is an open-source web development framework for Vue.js. In Nuxt versions 3.1.0 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6 and @nuxt/nitro-server versions 3.20.0 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6, the /__nuxt_island/* endpoint accepts attacker-controlled props query/body parameters and renders any island component without verifying that the URL-resident hash (<Name>_<hashId>.json) was actually issued for those inputs by <NuxtIsland>. The hash is computed and embedded client-side but never validated server-side, so the same path can return materially different responses depending on the query. This issue has been patched in versions 3.21.6 and 4.4.6.
| CWE | CWE-79 CWE-349 CWE-444 |
| Vendor | nuxt |
| Product | nuxt |
| Published | Jun 12, 2026 |
| Last Updated | Jun 12, 2026 |
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