CVE-2026-128072
@nuxt/webpack-builder and @nuxt/rspack-builder dev server serves built source to DNS rebinding pages
Nuxt is an open-source web development framework for Vue.js. From @nuxt/webpack-builder 3.0.0 and @nuxt/rspack-builder 3.12.2 until 4.6.4, the development middleware trusts Origin, Referer, or Sec-Fetch-Site when the Host header names the same attacker-controlled hostname. After DNS rebinding changes that hostname to a loopback address, a malicious page opened by a developer can read /_nuxt/*.js client chunks and inline source maps, exposing compiled application source, local filesystem paths, and developer-controlled values embedded in the client bundle. The attacker must know or guess the development-server port and induce the developer to open the malicious page; Chrome 142 and later and other Chromium-based browsers that enforce Local Network Access restrictions prompt before a public page can reach the loopback address. The default Vite builder and production builds are unaffected. This issue is fixed in version 4.6.4.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| nuxt nuxt |
>= 3.0.0, < 4.6.4 (affected) | CNA: GitHub_M |
| webpack-builder @nuxt |
>= 3.0.0, < 4.6.4 (affected) | CNA: GitHub_M |
| rspack-builder @nuxt |
>= 3.12.2, < 4.6.4 (affected) | CNA: GitHub_M |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 3.1 low |
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N | CNA: GitHub_M |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/nuxt/nuxt/security/advisories/GHSA-x2wv-5868-p7v2CNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/nuxt/nuxt/commit/3c9645326a2b3f5cfa09c9a935db9b1825d560e7CNA: GitHub_M · x_refsource_MISC
- https://github.com/nuxt/nuxt/commit/3e1c7964e6843e1c5f218867a4ccd4cd00ad9ebbCNA: GitHub_M · x_refsource_MISC
- https://github.com/nuxt/nuxt/commit/8c11d965dad5bfc58d4c25e796915aec045acb78CNA: GitHub_M · x_refsource_MISC
- https://github.com/nuxt/nuxt/commit/f8d64c9aa773a033596532365d455890da9da197CNA: GitHub_M · x_refsource_MISC
- https://github.com/nuxt/nuxt/releases/tag/v4.6.4CNA: GitHub_M · x_refsource_MISC
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