Vulnerability library
Security checkJuly 08, 2026

Nuxt: `__nuxt_island` endpoint does not bind responses to request props, enabling shared-cache poisoning

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Low severitynpm@nuxt/nitro-server

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Description

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>.

Recommendation

Update the @nuxt/nitro-server package to the latest compatible version. Followings are version details:

  • Affected version(s): **>= 4.2.0, <= 4.4.5 >= 3.20.0, <= 3.21.5**
  • Patched version(s): **4.4.6 3.21.6**

References

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See something that needs correcting? Let us knowUpdated July 08, 2026