Exposed Dangerous Method or Function Affecting @nuxt/webpack-builder package, versions >=3.15.4 <3.21.5>=4.0.0-alpha.1 <4.4.5
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-NUXTWEBPACKBUILDER-17178726
- published5 Jun 2026
- disclosed19 May 2026
- creditsapphi-red
Introduced: 19 May 2026
CVE-2026-45670 (opens in a new tab)How to fix?
Upgrade @nuxt/webpack-builder to version 3.21.5, 4.4.5 or higher.
Overview
@nuxt/webpack-builder is a Webpack bundler for Nuxt
Affected versions of this package are vulnerable to Exposed Dangerous Method or Function when using webpack or rspack builder and navigating to a malicious website. An attacker can inject a script tag to request a classic script, which is not restricted by the same-origin policy. This allows the script to execute and access the window.webpackChunknuxt_app object. By utilizing Function::toString on the values within this object, the attacker can extract and display the source code.
Note:
This is caused by an incomplete fix for CVE-2025-24361.