CVE-2026-49993 @nuxt/webpack-builder and @nuxt/rspack-builder dev server same-origin check bypassed when Sec-Fetch-Site, Origin, and Referer are all absent (incomplete fix for GHSA-6m52-m754-pw2g)

Nuxt is an open-source web development framework for Vue.js. In @nuxt/rspack-builder and @nuxt/webpack-builder from versions 3.15.4 to before 3.21.7 and 4.0.0 to before 4.4.7, there is an incomplete fix for GHSA-6m52-m754-pw2g. Source code may still be stolen during dev when using the webpack /...

CVE-2026-49993

Nuxt (Vue.js) users using the @nuxt/rspack-builder and @nuxt/webpack-builder are affected. The CVE concerns an incomplete fix for GHSA-6m52-m754-pw2g in versions 3.15.4–3.21.6 and 4.0.0–4.4.6, where the dev server could leak source code if bound to a non-loopback address and a malicious site is o...