CVE-2026-45670

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

MEDIUM

5.4

CVSS Score

Published: June 12, 2026 at 12:51 PM UTC

Updated: June 17, 2026 at 10:52 AM UTC

3 products affected across 1 vendorNuxt /rspack BuilderNuxt /webpack BuilderNuxt

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Severity

MEDIUM5.4

Exploit prediction

EPSS 0.2%

SSVC

PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nuxt /rspack Builder · Nuxt

95%

3.12.2 ≤ v < 3.21.54.0.0 ≤ v < 4.4.5

Affected range stops below 3.21.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.4.5, so it looks safe — our inference, not a vendor statement

Nuxt /webpack Builder · Nuxt

95%

3.0.0 ≤ v < 3.21.54.0.0 ≤ v < 4.4.5

Affected range stops below 3.21.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.4.5, so it looks safe — our inference, not a vendor statement

Nuxt · Nuxt

60%

v < 3.21.6v < 4.4.6

Affected range stops below 3.21.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.4.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_CONFIRMExploitVendor Advisory

Source: cverecord

https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g

x_refsource_MISCExploitVendor Advisory

Source: cverecord

https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99

x_refsource_MISCIssue Tracking

Source: cverecord

https://github.com/nuxt/nuxt/pull/35051

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-749

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