CVE-2026-6402

תיאור (מקור, אנגלית)

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.

מדדים

CVSS 3.1

6.5 (MEDIUM) מקור הציון: NVD CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

EPSS — סבירות ניצול

0% (אחוזון 000) נכון ל-29/9/2026

CWE

CWE-749

מוצרים מושפעים

webpack.js: webpack-dev-server

קישורים

• https://cna.openjsf.org/security-advisories.html Vendor Advisory
• https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-79cf-xc‮… MitigationVendor Advisory