CVE-2026-45670

MEDIUM

Nuxt: Dev server exposes built source over LAN to malicious sites (incomplete fix for GHSA-4gf7-ff8x-hq99)

Title source: cna
STIX 2.1

Description

Nuxt is an open-source web development framework for Vue.js. In @nuxt/rspack-builder and @nuxt/webpack-builder versions 3.15.4 to before 3.21.6, and 4.0.0-alpha.1 to before 4.4.6, there is an incomplete fix for GHSA-4gf7-ff8x-hq99. Source code may be stolen during dev when using the webpack / rspack builder if the dev server is bound to a non-loopback address (e.g. nuxt dev --host) and the developer opens a malicious site on the same network. This issue has been patched in versions 3.21.6 and 4.4.6.

References (3)

Core 3
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/nuxt/nuxt/pull/35051

Scores

CVSS v3 5.4
EPSS 0.0016
EPSS Percentile 5.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-749
Status published
Products (8)
nuxt/nuxt >= 3.15.4, < 3.21.6
nuxt/nuxt >= 4.0.0-alpha.1, < 4.4.6
nuxt/nuxt\/rspack-builder 3.12.2 - 3.21.5
nuxt/nuxt\/webpack-builder 3.0.0 - 3.21.5
nuxt/rspack-builder 3.15.4 - 3.21.6npm
nuxt/rspack-builder 4.0.0-alpha.1 - 4.4.6npm
nuxt/webpack-builder 3.15.4 - 3.21.6npm
nuxt/webpack-builder 4.0.0-alpha.1 - 4.4.6npm
Published Jun 12, 2026
Tracked Since Jun 12, 2026