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

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 non-trustworthy origins, allowing a malicious site to load the bundled source as a script and read it across origins. Impact: an attacker controlling a website visited by a developer running webpack-dev-server can recover the application source code when the dev server runs over HTTP at a guessable host and port. Chromium based browsers from Chrome 142 onward are not affected due to local network access restrictions. Upgrade to webpack-dev-server 5.2.4 or later, which sets Cross-Origin-Resource-Policy: same-origin on responses.

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

暴露危险的方法或函数

webpack-dev-server 安全漏洞

webpack-dev-server是webpack开源的一个提供webpack的应用程序。 webpack-dev-server 5.2.3及之前版本存在安全漏洞，该漏洞源于跨源源代码暴露问题，当通过非潜在可信源如纯HTTP提供服务时，可能导致恶意网站加载捆绑脚本并跨源读取。

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