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)
- State
- Published
- Severity
- 5.9 Medium
- Published
- Jun 12, 2026
- Updated
- Jun 12, 2026
- Reserved
- Jun 2, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.9 Medium | 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 | GitHub_M |
Weaknesses
- CWE-749 Exposed Dangerous Method or Function
Affected Products
| Product | Versions |
|---|---|
nuxtnuxt |
|
References
- https://github.com/nuxt/nuxt/security/advisories/GHSA-x6qj-4h56-5rj5
- https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g
- https://github.com/nuxt/nuxt/pull/35200
- https://github.com/nuxt/nuxt/commit/77187ee4015e9267fb464951542a3e09e8b5fa05
- https://github.com/nuxt/nuxt/commit/e351de943e82db16970618b60dc7fdbaa58630f3
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