Vulnerability · Published Jun 12, 2026 · Assigned by GitHub_M
CVE-2026-45670Nuxt: Dev server exposes built source over LAN to malicious sites (incomplete fix for GHSA-4gf7-ff8x-hq99)
Medium 5.9
In plain English
A medium-severity security flaw in nuxt from nuxt. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @nuxt/rspack-builder | 3.21.6 | GHSA-6m52-m754-pw2g |
| npm | @nuxt/rspack-builder | 4.4.6 | GHSA-6m52-m754-pw2g |
| npm | @nuxt/webpack-builder | 3.21.6 | GHSA-6m52-m754-pw2g |
| npm | @nuxt/webpack-builder | 4.4.6 | GHSA-6m52-m754-pw2g |
Affected products (as reported)
Weakness: CWE-749 · Vector: CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g x_refsource_CONFIRM
- https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99 x_refsource_MISC
- https://github.com/nuxt/nuxt/pull/35051 x_refsource_MISC