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Vendor

webpack-dev-server

6 known vulnerabilities.

webpack-dev-server at a glance

Last 12 months
6
Critical · all time
0
Exploited · all time
0
Public exploit · all time
1
New vulnerabilities per month · last 12 months
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Products

webpack-dev-server 6
All Critical High Medium Low Exploited only Public exploit

6 results · Feed

  • Medium 5.3
    CVE-2026-114348

    webpack-dev-server vulnerable to information disclosure via Host validation bypass in the open-editor endpoint

    webpack-dev-server is a development server that provides live reloading for webpack projects. In versions from 5.1.0 before 5.2.7 and in version 6.0.0, the unauthenticated open-editor endpoint validates the Host header with a regular expression meant for brow…

    webpack-dev-server webpack-dev-server node-webpack Ubuntu
  • High 8.2
    CVE-2026-112085

    webpack-dev-server vulnerable to cross-origin WebSocket access via proxied upgrades

    webpack-dev-server is a development server that provides live reloading for webpack projects. In versions before 5.2.7 and in version 6.0.0, when a proxy entry is configured to forward WebSockets, the server forwards non-HMR WebSocket upgrade requests to the …

    webpack-dev-server webpack-dev-server node-webpack Ubuntu
  • Medium 5.3
    CVE-2026-14631

    webpack-dev-server vulnerable to denial of service via a malformed Host or Origin header

    webpack-dev-server versions 5.2.5 and earlier terminate the whole Node.js process when an unauthenticated peer sends either a normal HTTP request with a malformed Host header or a WebSocket upgrade to the default /ws endpoint with a malformed Origin header. T…

    webpack-dev-server webpack-dev-server webpack-dev-server npm
  • Medium 4.7
    CVE-2026-14620 Public exploit

    webpack-dev-server vulnerable to cross-site request forgery via internal developer endpoints

    webpack-dev-server versions 5.2.5 and earlier expose two internal developer endpoints, /webpack-dev-server/open-editor and /webpack-dev-server/invalidate, that perform state-changing actions on any GET request without verifying that the request originated fro…

    webpack-dev-server webpack-dev-server webpack-dev-server npm
  • Medium 5.3
    CVE-2026-9595

    webpack-dev-server vulnerable to HMR WebSocket interception via permissive user proxies

    Impact: When a user-configured proxy on webpack-dev-server has a broad context (e.g. /) and ws: true, it also intercepts the dev server's own HMR WebSocket and forwards it to the proxy target. This leaks the browser's cookies and Origin header to the backend,…

    webpack-dev-server webpack-dev-server webpack-dev-server node-webpack Ubuntu npm
  • Medium 5.3
    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 heade…

    webpack-dev-server webpack-dev-server webpack-dev-server npm