medium5.4
CVE-2026-45670
Nuxt: Dev server exposes built source over LAN to malicious sites (incomplete fix for GHSA-4gf7-ff8x-hq99)
Impact
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
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @nuxt/rspack-builder | >= 3.15.4, <= 3.21.5 | 3.21.6 |
| npm | @nuxt/webpack-builder | >= 3.15.4, <= 3.21.5 | 3.21.6 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Nuxt | Nuxt\/Rspack-Builder | from 3.12.2 before 3.21.5 from 4.0.0 before 4.4.5 |
| Nuxt | Nuxt\/Webpack-Builder | from 3.0.0 before 3.21.5 from 4.0.0 before 4.4.5 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-6m52-m754-pw2g
- https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g
- https://github.com/nuxt/nuxt/pull/35051
- https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99
- https://nvd.nist.gov/vuln/detail/CVE-2026-45670