Medium severity · published Jun 12, 2026
CVE-2026-45670
Nuxt: Dev server exposes built source over LAN to malicious sites (incomplete fix for GHSA-4gf7-ff8x-hq99)
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NU
nuxt · nuxt
>= 3.15.4, < 3.21.6; >= 4.0.0-alpha.1, < 4.4.6 · source: vendor
NU
Nuxt/rspack-builder · Nuxt
3.12.2 before 3.21.5; 4.0.0 before 4.4.5 · source: NVD
NU
Nuxt/webpack-builder · Nuxt
3.0.0 before 3.21.5; 4.0.0 before 4.4.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45670
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-45670
Issue Tracking
https://github.com/nuxt/nuxt/pull/35051
Exploit
https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99
Exploit
https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g
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