CVE-2026-6402

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

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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 5.3 · Средний · EPSS 0,3% · Есть исправление

Опубликовано

2026-05-12T07:45:21.253Z

Обновлено

2026-05-12T13:00:06.847Z

Стек: node

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