CVE-2025-59414: Nuxt client-side path traversal in Island payload revival

CVE-2025-59414 · Severity: low · CVSS 3.1 · Published 2025-09-17

Nuxt is a popular web framework for building Vue.js applications. A vulnerability in its Island prerendering feature allows attackers who control an API endpoint to craft malicious responses that cause client browsers to make unintended requests to different parts of the same application. This requires the app to be prerendered, the attacker to control an API response, and a user to navigate to the prerendered page, making it a limited-impact issue with low practical risk.

Technologies: nuxt (npm). Vendors: npm.

Quick answers

Is CVE-2025-59414 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-59414 being exploited in the wild.
How severe is CVE-2025-59414?
Low severity, with a CVSS score of 3.1, published 17 September 2025.
Which products and versions are affected?
nuxt (npm) SEMVER:introduced=3.6.0,fixed=3.19.0.
Is there a fix for CVE-2025-59414?
Yes. nuxt (npm): upgrade to 3.19.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-59414 attacked?
It is attacked over the network.
Am I affected by CVE-2025-59414?
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 3.19.0 or later
    npm install nuxt@3.19.0

Technical details

A client-side path traversal vulnerability exists in Nuxt's Island payload revival mechanism (revive-payload.client.ts). During prerendering, if an API endpoint returns user-controlled data with a crafted __nuxt_island object containing path traversal sequences in the "key" field, the client will deserialize this payload and attempt to fetch /__nuxt_island/${key}.json, potentially traversing to unintended endpoints. The attack requires three conditions: prerendering enabled, attacker control over an API response called during prerendering, and client-side navigation to the prerendered page. The vulnerability is mitigated by strict validation of Island keys (alphanumeric with hyphens, max 100 chars). Patches are available in Nuxt 3.19.0+ and 4.1.0+.

Affected products

  • Nuxt Nuxt 3.6.0-3.18.x, 4.0.0-4.0.x

Identifiers

  • CVE-2025-59414
  • GHSA-p6jq-8vc4-79f6

Timeline

  • 2025-09-17: disclosed: Advisory published
  • 2025-09-17: patched: Patch released in versions 3.19.0 and 4.1.0

References

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