# CVE-2026-71320: Nuxt RCE via Runtime Template Injection in Server Island Props

Source: https://junglewise.ai/threats/cve-2026-71320-nuxt-rce-via-runtime-template-injection-in-server-island-props  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-05. Updated: 2026-08-05  
License: CC BY 4.0 with a link back

CVE-2026-71320 · Severity: high · CVSS 8.1 · Published 2026-08-05

Nuxt is a popular web framework for building Vue.js applications. A vulnerability in its 'server islands' feature allows attackers to execute malicious code on the server if specific configuration settings are enabled. This could lead to a full system compromise, unauthorized data access, or service disruption.

Technologies: [nuxt (npm)](https://junglewise.ai/threats/technologies/nuxt). Vendors: [npm](https://junglewise.ai/threats/vendors/npm).

## Quick answers

**Is CVE-2026-71320 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-71320 being exploited in the wild.

**How severe is CVE-2026-71320?** High severity, with a CVSS score of 8.1, published 5 August 2026.

**Which products and versions are affected?** nuxt (npm) SEMVER:introduced=4.0.0,fixed=4.5.1.

**Is there a fix for CVE-2026-71320?** Yes. nuxt (npm): upgrade to 4.5.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-71320 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-71320?** Check whether you run nuxt (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- nuxt (npm): upgrade to 4.5.1 or later

  ```sh
  npm install nuxt@4.5.1
  ```


## Technical details

A remote code execution (RCE) vulnerability exists in Nuxt core when 'Server Islands' are used in conjunction with the Vue runtime compiler (vue.runtimeCompiler: true). Attackers can inject a 'template' key into island props via the /__nuxt_island/ endpoint. If these props are forwarded to dynamic component resolution functions like <component :is>, resolveDynamicComponent, or h(), the Vue runtime compiler will execute the attacker-controlled template in the server process. This can occur even without explicit prop forwarding due to Vue's attribute inheritance (fallthrough) if the island's root is a polymorphic component. The vulnerability is fixed in Nuxt versions 3.21.10 and 4.5.1.

## Affected products

- Nuxt Nuxt >= 3.4.0, < 3.21.10; >= 4.0.0, < 4.5.1

## Identifiers

- CVE-2026-71320
- GHSA-9473-5f9j-94wq

## Timeline

- 2026-07-27: disclosed: Initial disclosure by developer
- 2026-08-05: advisory: GitHub Advisory published
- 2026-08-05: patched: Fixes released in 3.21.10 and 4.5.1

## References

- [https://github.com/nuxt/nuxt/security/advisories/GHSA-9473-5f9j-94wq](https://github.com/nuxt/nuxt/security/advisories/GHSA-9473-5f9j-94wq)
- [https://github.com/nuxt/nuxt/commit/5b60017f7f1d5e9384cadf1d6c580b99d583c418](https://github.com/nuxt/nuxt/commit/5b60017f7f1d5e9384cadf1d6c580b99d583c418)
- [https://github.com/nuxt/nuxt/commit/ee6c846338f4eb75801815dda86df1f494725859](https://github.com/nuxt/nuxt/commit/ee6c846338f4eb75801815dda86df1f494725859)
- [https://github.com/nuxt/nuxt/releases/tag/v3.21.10](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/releases/tag/v4.5.1)
- [https://api.github.com/repos/nuxt/nuxt/security-advisories/GHSA-9473-5f9j-94wq](https://api.github.com/repos/nuxt/nuxt/security-advisories/GHSA-9473-5f9j-94wq)

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