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)
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
7th
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 / 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 3.21.7 and 4.4.7.
| CWE | CWE-749 |
| Vendor | nuxt |
| Product | nuxt |
| Published | Jun 12, 2026 |
| Last Updated | Jun 12, 2026 |
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Affected Versions
nuxt / nuxt
>= 3.15.4, < 3.21.7 >= 4.0.0, < 4.4.7
References
github.com: https://github.com/nuxt/nuxt/security/advisories/GHSA-x6qj-4h56-5rj5 github.com: https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g github.com: https://github.com/nuxt/nuxt/pull/35200 github.com: https://github.com/nuxt/nuxt/commit/77187ee4015e9267fb464951542a3e09e8b5fa05 github.com: https://github.com/nuxt/nuxt/commit/e351de943e82db16970618b60dc7fdbaa58630f3