# CVE-2026-128072: @nuxt/webpack-builder and @nuxt/rspack-builder dev server serves built source to DNS rebinding pages

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

Nuxt is an open-source web development framework for Vue.js. From @nuxt/webpack-builder 3.0.0 and @nuxt/rspack-builder 3.12.2 until 4.6.4, the development middleware trusts Origin, Referer, or Sec-Fetch-Site when the Host header names the same attacker-controlled hostname. After DNS rebinding changes that hostname to a loopback address, a malicious page opened by a developer can read /_nuxt/*.js client chunks and inline source maps, exposing compiled application source, local filesystem paths, and developer-controlled values embedded in the client bundle. The attacker must know or guess the development-server port and induce the developer to open the malicious page; Chrome 142 and later and other Chromium-based browsers that enforce Local Network Access restrictions prompt before a public page can reach the loopback address. The default Vite builder and production builds are unaffected. This issue is fixed in version 4.6.4.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- nuxt / nuxt: >= 3.0.0, < 4.6.4 (affected). Source: CNA: GitHub_M
- @nuxt / webpack-builder: >= 3.0.0, < 4.6.4 (affected). Source: CNA: GitHub_M
- @nuxt / rspack-builder: >= 3.12.2, < 4.6.4 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 3.1 (low); CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-346

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/nuxt/nuxt/security/advisories/GHSA-x2wv-5868-p7v2 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/nuxt/nuxt/commit/3c9645326a2b3f5cfa09c9a935db9b1825d560e7 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/nuxt/nuxt/commit/3e1c7964e6843e1c5f218867a4ccd4cd00ad9ebb (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/nuxt/nuxt/commit/8c11d965dad5bfc58d4c25e796915aec045acb78 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/nuxt/nuxt/commit/f8d64c9aa773a033596532365d455890da9da197 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/nuxt/nuxt/releases/tag/v4.6.4 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-128072; retrieved 2026-11-13; source updated 2026-11-13

Revision: 8de08970df9d4ea3f6ba64188ae1eb5f2ee1b2de7f907eda16238f6e259052fe

Canonical: https://y2.dev/cve/CVE-2026-128072

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.