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

TRUNG BÌNH 5.3CVE-2026-14631 · GHSA-m28w-2pqf-7qgj · Công bố 03/07/2026 · cập nhật 07/07/2026

Tóm tắt nhanh

CVE-2026-14631 là lỗ hổng mức TRUNG BÌNH (CVSS 5.3) ảnh hưởng webpack-dev-server (webpack.js), webpack-dev-server.
Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.52%, cao hơn 44.0% các lỗ hổng khác.
Cách xử lý: cập nhật lên 5.2.6 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
webpack-dev-server webpack.js	`< 5.2.6`	`5.2.6`
webpack-dev-server npm	`< 5.2.6`	`5.2.6`

Mô tả

Impact

An unauthenticated peer that can reach the webpack-dev-server process can terminate it by sending either a normal HTTP request with a malformed Host header, or a WebSocket upgrade to the default /ws endpoint with a malformed Origin header. The malformed header triggers an uncaught exception in the host-validation path and crashes the dev server process.

Patches

Fixed in webpack-dev-server 5.2.6 by treating malformed Host and Origin header values as invalid rather than throwing (see PR #5699).

Workarounds

Keep the dev server bound to localhost (the default) and do not expose it to untrusted networks.

Mô tả của NVD

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. The malformed value causes an uncaught exception in the host-validation path and crashes the dev server. Impact is limited to availability of the development server, no data disclosure, no code execution. Patches: upgrade to webpack-dev-server 5.2.6. Workarounds: keep the dev server bound to localhost (the default) and do not expose it to untrusted networks.