CVE-2018-14732

CVE-2018-14732 affects webpack-dev-server before 3.1.6. The WebSocket server used for Hot Module Replacement does not validate the request origin, allowing any origin (including ws://127.0.0.1:8080/) to receive HMR messages. This can enable an attacker to access a developer’s source code from a p...

CVE-2025-30360

The CVE-2025-30360 entry concerns webpack-dev-server prior to v5.2.1, where an Origin header check for WebSocket connections was insufficient, allowing IP-based origins to access the WebSocket and potentially exfiltrate source code to malicious sites using non-Chromium browsers. The issue is miti...

CVE-2025-30359

Webpack-dev-server CVE-2025-30359 affects the development server used to serve webpack bundles. Before version 5.2.1, an attacker could steal a user’s source code via a malicious site by injecting a script and abusing prototype pollution; exploitation could reveal code through webpack_modules via...

CVE-2026-6402

The CVE-2026-6402 entry concerns webpack-dev-server (versions up to 5.2.3) and a cross-origin source code exposure when served over non-HTTPS/or untrusted origins. The root cause is that the prior fix relied on Sec-Fetch-Mode and Sec-Fetch-Site headers, which browsers omit for non-trustworthy ori...