High severity7.5NVD Advisory· Published Aug 5, 2026· Updated Sep 8, 2026
CVE-2026-71321
CVE-2026-71321
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
nuxtnpm | >= 4.0.0, < 4.5.1 | 4.5.1 |
nuxtnpm | >= 3.1.0, < 3.21.10 | 3.21.10 |
Affected products
1Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-9pgf-384g-p7mvghsaADVISORY
- github.com/nuxt/nuxt/commit/4e35ae9babd94be53246e31200232d48438bb34envdWEB
- github.com/nuxt/nuxt/commit/668cdfdfda41849ed11c1ee5e2067a11fc103b22nvdWEB
- github.com/nuxt/nuxt/releases/tag/v3.21.10nvdWEB
- github.com/nuxt/nuxt/releases/tag/v4.5.1nvdWEB
- github.com/nuxt/nuxt/security/advisories/GHSA-9pgf-384g-p7mvnvdWEB
News mentions
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