CVE-2026-71320: Nuxt: Server-Side Remote Code Execution via Runtime Template Injection in Nuxt Server Island Props

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-05 · updated 2026-09-08
Weakness: CWE-74

Description

Nuxt is an open-source web development framework for Vue.js. From 3.4.0 until 3.21.10 and 4.5.1, an attacker can inject a template key through /__nuxt_island/ props into a dynamic component when `vue.runtimeCompiler: true` is enabled, causing template execution in the Nitro process. This issue is fixed in 3.21.10 and 4.5.1.

Affected products

nuxt: from 4.0.0, < 4.5.1; from 3.4.0, < 3.21.10

References

https://github.com/nuxt/nuxt/commit/5b60017f7f1d5e9384cadf1d6c580b99d583c418
https://github.com/nuxt/nuxt/commit/ee6c846338f4eb75801815dda86df1f494725859
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-9473-5f9j-94wq

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