Vulnerability in Nuxt
CVE-2026-45670
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (28.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
- Nuxt — versions >= 3.15.4, < 3.21.6, >= 4.0.0-alpha.1, < 4.4.6
- Nuxt Nuxt\/rspack-Builder
- Nuxt Nuxt\/webpack-Builder
Weakness classification (CWE)
References
- github.com/nuxt/nuxt/pull/35051 (Issue Tracking)
- github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99 (Exploit, Vendor Advisory)
- github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-45670?
- CVE-2026-45670 is a medium-severity vulnerability in Nuxt, classified under CWE-749. CVSS score: 5.4/10. Published 2026-06-12.
- How severe is CVE-2026-45670?
- Medium severity. CVSS v3 base score is 5.4 out of 10.