Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nuxt | Nuxt | >= 3.1.0, < 3.21.6 |
| Nuxt | Nuxt\/Nitro-Server | >= 3.20.0, < 3.21.6 |
Related Weaknesses (CWE)
References
- https://github.com/nuxt/nuxt/pull/35077Issue Tracking
- https://github.com/nuxt/nuxt/security/advisories/GHSA-g8wj-3cr3-6w7vMitigationPatchVendor Advisory
FAQ
What is CVE-2026-46342?
CVE-2026-46342 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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...
How severe is CVE-2026-46342?
CVE-2026-46342 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46342?
Check the references section above for vendor advisories and patch information. Affected products include: Nuxt Nuxt, Nuxt Nuxt\/Nitro-Server.