CVE-2026-45670 Nuxt: Dev server exposes built source over LAN to malicious sites (incomplete fix for GHSA-4gf7-ff8x-hq99)

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 /...

CVE-2026-45670

Summary (CVE-2026-45670) Nuxt.js dev-server exposure issue affects @nuxt/webpack-builder and @nuxt/rspack-builder. An incomplete fix for GHSA-4gf7-ff8x-hq99 allowed source-code leakage when the dev server is bound to a non-loopback address (for example, nuxt dev --host) and a user visits a malici...

PT-2026-48868

Name of the Vulnerable Software and Affected Versions @nuxt/rspack-builder versions 3.15.4 through 3.21.6 @nuxt/rspack-builder versions 4.0.0 through 4.4.6 @nuxt/webpack-builder versions 3.15.4 through 3.21.6 @nuxt/webpack-builder versions 4.0.0 through 4.4.6 Description An incomplete fix in the...

VulnCheck KEV: CVE-2026-39365

Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, the dev server’s handling of .map requests for optimized dependencies resolves file paths and calls readFile without restricting ../ segments in the URL. As a result, it is possible to bypass the...

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

Summary This 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. Details The fix for...

GHSA-6M52-M754-PW2G Nuxt: Dev server exposes built source over LAN to malicious sites (incomplete fix for GHSA-4gf7-ff8x-hq99)

Summary This 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. Details The fix for...

PT-2026-41963

Name of the Vulnerable Software and Affected Versions @nuxt/rspack-builder versions 3.15.4 through 3.21.5 @nuxt/rspack-builder versions 4.0.0-alpha.1 through 4.4.5 @nuxt/webpack-builder versions 3.15.4 through 3.21.5 @nuxt/webpack-builder versions 4.0.0-alpha.1 through 4.4.5 Description An...

NPM: webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins

NPM: webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins vulnerability discovered by ? in WordPress Npm webpack-dev-server versions = 5.2.3...

EUVD-2026-29404

webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins...

GHSA-79CF-XCQC-C78W webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins

Impact When webpack-dev-server is running on a non-HTTPS origin the default, cross-origin requests from malicious websites can load the dev server's JavaScript bundles via tags. The fix introduced in v5.2.1 CVE-2025-30359 relied on Sec-Fetch-Mode and Sec-Fetch-Site request headers to block these...

webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins

Impact When webpack-dev-server is running on a non-HTTPS origin the default, cross-origin requests from malicious websites can load the dev server's JavaScript bundles via tags. The fix introduced in v5.2.1 CVE-2025-30359 relied on Sec-Fetch-Mode and Sec-Fetch-Site request headers to block these...

Linux Distros Unpatched Vulnerability : CVE-2026-6402

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - webpack-dev-server versions up to and including 5.2.3 are vulnerable to cross-origin source code exposure when serving over a non-potentially trustworthy origin...

SUSE CVE-2026-6402

webpack-dev-server versions up to and including 5.2.3 are vulnerable to cross-origin source code exposure when serving over a non-potentially trustworthy origin such as plain HTTP. The previous fix relied on the Sec-Fetch-Mode and Sec-Fetch-Site request headers, which browsers omit for...

CVE-2026-6402

A flaw was found in webpack-dev-server. When the development server operates over plain HTTP, a remote attacker can exploit a cross-origin source code exposure vulnerability. This allows a malicious website, visited by a developer, to load the bundled application source code as a script and read ...

Exposed Dangerous Method or Function

Overview webpack-dev-server is an Uses webpack with a development server that provides live reloading. It should be used for development only. Affected versions of this package are vulnerable to Exposed Dangerous Method or Function in Server.js, when handling non-HTTPS responses. An attacker can...

@4399ywkf/core (>=5.0.0 <=5.0.32), @all-star/base (>=0.17.0 <=0.18.2) +327 more potentially affected by CVE-2025-30359 +1 more via webpack-dev-server (>=5.0.0 <=5.2.3)

webpack-dev-server NPM version =5.0.0, =5.0.0, =0.17.0, =0.17.0, =0.17.0, =8.0.0-next.2, =20.3.1, =20.3.0, =18.0.0, =18.0.0, =18.2.6-RC-1, =18.0.0, =18.0.0, =5.0.0, =1.0.5-beta.4, =1.0.1, =1.0.17 and more Source cves: CVE-2025-30359, CVE-2026-6402 Source advisory: SNYK:JS-WEBPACKDEVSERVER-1664206...

Exposed Dangerous Method or Function

Overview org.webjars.npm:webpack-dev-server is an Uses webpack with a development server that provides live reloading. It should be used for development only. Affected versions of this package are vulnerable to Exposed Dangerous Method or Function in Server.js, when handling non-HTTPS responses. ...

CVE-2026-6402

webpack-dev-server versions up to and including 5.2.3 are vulnerable to cross-origin source code exposure when serving over a non-potentially trustworthy origin such as plain HTTP. The previous fix relied on the Sec-Fetch-Mode and Sec-Fetch-Site request headers, which browsers omit for...

CVE-2026-6402 webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins

webpack-dev-server versions up to and including 5.2.3 are vulnerable to cross-origin source code exposure when serving over a non-potentially trustworthy origin such as plain HTTP. The previous fix relied on the Sec-Fetch-Mode and Sec-Fetch-Site request headers, which browsers omit for...

CVE-2026-6402

webpack-dev-server versions up to and including 5.2.3 are vulnerable to cross-origin source code exposure when serving over a non-potentially trustworthy origin such as plain HTTP. The previous fix relied on the Sec-Fetch-Mode and Sec-Fetch-Site request headers, which browsers omit for...