CVE-2026-45670
Nuxt: Dev server exposes built source over LAN to malicious sites (incomplete fix for GHSA-4gf7-ff8x-hq99)
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.
INFO
Published Date :
June 12, 2026, 2:16 p.m.
Last Modified :
June 15, 2026, 6:08 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-45670
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update @nuxt/rspack-builder to version 3.21.6 or later.
- Update @nuxt/webpack-builder to version 3.21.6 or later.
- Update @nuxt/webpack-builder to version 4.4.6 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45670.
| URL | Resource |
|---|---|
| https://github.com/nuxt/nuxt/pull/35051 | Issue Tracking |
| https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99 | Exploit Vendor Advisory |
| https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g | Exploit Vendor Advisory |
| https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99 | Exploit Vendor Advisory |
| https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45670 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45670
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45670 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45670 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 15, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:nuxt:nuxt/rspack-builder:*:*:*:*:*:node.js:*:* versions from (including) 3.12.2 up to (excluding) 3.21.5 *cpe:2.3:a:nuxt:nuxt/rspack-builder:*:*:*:*:*:node.js:*:* versions from (including) 4.0.0 up to (excluding) 4.4.5 *cpe:2.3:a:nuxt:nuxt/webpack-builder:*:*:*:*:*:node.js:*:* versions from (including) 3.0.0 up to (excluding) 3.21.5 *cpe:2.3:a:nuxt:nuxt/webpack-builder:*:*:*:*:*:node.js:*:* versions from (including) 4.0.0 up to (excluding) 4.4.5 Added Reference Type GitHub, Inc.: https://github.com/nuxt/nuxt/pull/35051 Types: Issue Tracking Added Reference Type CISA-ADP: https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99 Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99 Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 12, 2026
Action Type Old Value New Value Added Reference https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99 Added Reference https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g -
New CVE Received by [email protected]
Jun. 12, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-749 Added Reference https://github.com/nuxt/nuxt/pull/35051 Added Reference https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99 Added Reference https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g