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 · Mittel · EPSS 0,3% · Korrektur verfügbar
- Veröffentlicht
- Aktualisiert
Technologie-Stack: node
Betroffene Produkte und Versionen
webpack-dev-server
- Softwareversionen
- ≥ 0, < 5.2.4: Betroffen (semver)
- 5.2.4: Nicht betroffen (semver)
Auf 5.2.4 aktualisieren
webpack-dev-server npm
- Betroffene Versionsbereiche
- SEMVER: < 5.2.4
Auf 5.2.4 aktualisieren