HIGH

CVE-2026-71321

2026-08-05 CVSS v3.1

CVSS

7.5

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.

Weakness (CWE)

CWE-407

CWE-770 Resource Allocation Without Limits

EPSS Score

0.42%

Probability of exploitation in next 30 days

36.2th percentile

References

https://github.com/nuxt/nuxt/commit/4e35ae9babd94be53246e31200232d48438bb34e https://github.com/nuxt/nuxt/commit/668cdfdfda41849ed11c1ee5e2067a11fc103b22 https://github.com/nuxt/nuxt/releases/tag/v3.21.10 https://github.com/nuxt/nuxt/releases/tag/v4.5.1 https://github.com/nuxt/nuxt/security/advisories/GHSA-9pgf-384g-p7mv

View on dbcve.org

Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

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