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CVE-2026-71321

Nuxt: Unauthenticated CPU exhaustion parsing and hashing the Nuxt island endpoint body before hash validation PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
nuxt / nuxtaffected >= 4.0.0, < 4.5.1; affected >= 3.1.0, < 3.21.10

CWE

CWE-407, CWE-770

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.