# CVE-2026-71314: Nuxt denial of service via unbounded v-for expansion in island rendering

Source: https://junglewise.ai/threats/cve-2026-71314-nuxt-denial-of-service-via-unbounded-v-for-expansion-in-island  
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-2026-71314 · Severity: high · CVSS 7.5 · Published 2026-08-05

Nuxt, a popular framework for building web applications, is vulnerable to a denial-of-service attack. An unauthenticated attacker can send a specially crafted request that forces the server to allocate an excessive amount of memory, leading to a system crash. This can disrupt business operations by making the website or application unavailable to legitimate users.

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

## Quick answers

**Is CVE-2026-71314 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-71314 being exploited in the wild.

**How severe is CVE-2026-71314?** High severity, with a CVSS score of 7.5, 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-2026-71314?** 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-2026-71314 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-71314?** 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

Nuxt is vulnerable to uncontrolled resource consumption (CWE-400) within its island rendering engine. The vulnerability exists because the island URL hash is a non-secret digest, allowing an attacker to compute valid hashes for arbitrary props. By sending a large integer as a prop to a component using 'v-for' (e.g., v-for='n in count'), the server attempts to expand the loop into millions of nodes during Server-Side Rendering (SSR). This results in excessive memory allocation and an out-of-memory (OOM) crash of the worker process. The issue affects both Vue's 'ssrRenderList' and the 'vforToArray' slot helper. Patches in versions 4.5.1 and 3.21.10 introduce a 'MAX_VFOR_LENGTH' clamp of 100,000 iterations to mitigate this amplification.

## Affected products

- Nuxt Nuxt >= 4.0.0, < 4.5.1; >= 3.1.0, < 3.21.10

## Identifiers

- CVE-2026-71314
- GHSA-hxcr-hm88-mpq6

## Timeline

- 2026-07-27: disclosed
- 2026-08-05: advisory
- 2026-08-05: patched

## References

- [https://api.github.com/users/manop55555](https://api.github.com/users/manop55555)
- [https://github.com/manop55555](https://github.com/manop55555)
- [https://api.github.com/users/manop55555/gists%7B/gist_id%7D](https://api.github.com/users/manop55555/gists%7B/gist_id%7D)
- [https://api.github.com/users/manop55555/repos](https://api.github.com/users/manop55555/repos)
- [https://avatars.githubusercontent.com/u/109808848?v=4](https://avatars.githubusercontent.com/u/109808848?v=4)
- [https://api.github.com/users/manop55555/events%7B/privacy%7D](https://api.github.com/users/manop55555/events%7B/privacy%7D)

## Related threats

- [Nuxt path traversal via dot segment normalization bypass](https://junglewise.ai/threats/cve-2026-119200-nuxt-is-an-open-source-web-development-framework-for-vue-js-from)
- [Nuxt stored cross-site scripting in useHeadSafe server island rendering](https://junglewise.ai/threats/cve-2026-114133-nuxt-is-an-open-source-web-development-framework-for-vue-js-from)
- [Nuxt case-sensitive route matching bypass](https://junglewise.ai/threats/cve-2026-114132-nuxt-is-an-open-source-web-development-framework-for-vue-js)
- [Nuxt route-rule bypass via percent-encoded segments](https://junglewise.ai/threats/cve-2026-114131-nuxt-is-an-open-source-web-development-framework-for-vue-js-from)
- [Nuxt XSS via protocol bypass in NuxtLink](https://junglewise.ai/threats/cve-2026-114130-nuxt-is-an-open-source-web-development-framework-for-vue-js)