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CVE-2026-45670

Nuxt: Dev server exposes built source over LAN to malicious sites (incomplete fix for GHSA-4gf7-ff8x-hq99)

Published: Jun 12, 2026Updated: Jun 15, 2026 Sources: CVE List NVDCWE-749
NVD MITRE
5.4CVSSMEDIUM
EPSS Score
0.2%
Top 89.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Breakdown

AV:NAC:LPR:NUI:RS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-749

Affected Products

nuxt\/rspack-buildernuxt
Library
OSS Libraries / web-framework
nuxt\/webpack-buildernuxt
Library
OSS Libraries / web-framework
nuxtnuxt
Library
OSS Libraries / web-framework
nuxtoss-projectOSS Librariesaka nuxt.js, nuxt/framework

Exploitability

Official Patch Available

References

https://github.com/nuxt/nuxt/pull/35051
github.com
https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99
github.com
https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g
github.com

Timeline

Published
Jun 12, 2026
Last Updated
Jun 15, 2026

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