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

NPM: webpack-dev-server vulnerable to denial of service via a malformed Host or Origin header vulnerability discovered by ? in WordPress Npm webpack-dev-server versions = 5.2.5...

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

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 exceptio...

@4399ywkf/core (>=5.0.0, <=5.0.32), @all-star/base (>=0.17.0, <=0.18.2) +323 more potentially affected by CVE-2026-14631 via webpack-dev-server (>=5.0.0, <=5.2.5)

webpack-dev-server NPM version =5.0.0, =5.0.0, =0.17.0, =0.17.0, =0.17.0, =8.0.0-next.2, =18.0.0-beta.3, =18.0.0-beta.3, =18.2.6-RC-1, =18.0.0, =18.0.0-next.0, =0.7.7, =1.0.5-beta.4, =1.0.1-beta.1, =0.18.3, =0.0.1, =0.3.2 and more Source cves: CVE-2026-14631 Source advisory: OSV:GHSA-M28W-2PQF-7Q...

GHSA-M28W-2PQF-7QGJ webpack-dev-server vulnerable to denial of service via a malformed Host or Origin header

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 exceptio...

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

NPM: webpack-dev-server vulnerable to cross-site request forgery via internal developer endpoints vulnerability discovered by ? in WordPress Npm webpack-dev-server versions = 5.2.5...

@4399ywkf/core (>=5.0.0, <=5.0.32), @all-star/base (>=0.17.0, <=0.18.2) +323 more potentially affected by CVE-2026-14620 via webpack-dev-server (>=5.0.0, <=5.2.5)

webpack-dev-server NPM version =5.0.0, =5.0.0, =0.17.0, =0.17.0, =0.17.0, =8.0.0-next.2, =18.0.0-beta.3, =18.0.0-beta.3, =18.2.6-RC-1, =18.0.0, =18.0.0-next.0, =0.7.7, =1.0.5-beta.4, =1.0.1-beta.1, =0.18.3, =0.0.1, =0.3.2 and more Source cves: CVE-2026-14620 Source advisory: OSV:GHSA-F5VJ-F2HX-8M...

GHSA-F5VJ-F2HX-8M93 webpack-dev-server vulnerable to cross-site request forgery via internal developer endpoints

Impact The internal /webpack-dev-server/open-editor and /webpack-dev-server/invalidate endpoints perform state-changing actions on any GET request, without verifying that the request originated from the dev server's own page. Any website a developer visits while the dev server is running can...

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

Impact The internal /webpack-dev-server/open-editor and /webpack-dev-server/invalidate endpoints perform state-changing actions on any GET request, without verifying that the request originated from the dev server's own page. Any website a developer visits while the dev server is running can...

EUVD-2026-41558

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

webpack-dev-server: webpack-dev-server: Information disclosure and denial of service via improper proxy configuration

A flaw was found in webpack-dev-server. When a user configures a proxy with a broad context, such as '/', and enables WebSocket ws: true forwarding, the development server's own Hot Module Replacement HMR WebSocket can be intercepted. This interception leads to the leakage of the browser's cookie...

Important: Red Hat Security Advisory: Red Hat Data Grid 8.6.2 security update

An update for Red Hat Data Grid 8 is now available. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE links in the...

SUSE CVE-2026-14620

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 from the dev server's own page. Any websi...

SUSE CVE-2026-14631

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...

Linux Distros Unpatched Vulnerability : CVE-2026-14620

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

CVE-2026-14631

A flaw was found in webpack-dev-server. An unauthenticated remote attacker could send a specially crafted HTTP request with a malformed Host header or a WebSocket upgrade with a malformed Origin header. This malformed input causes an uncaught exception, leading to the termination of the Node.js...

Improper Input Validation

Overview webpack-dev-server is an Uses webpack with a development server that provides live reloading. It should be used for development only. Affected versions of this package are vulnerable to Improper Input Validation through the host-validation process. An attacker can cause the server to...

@4399ywkf/core (>=5.0.0, <=5.0.32), @all-star/base (>=0.17.0, <=0.18.2) +323 more potentially affected by CVE-2026-14631 via webpack-dev-server (>=5.0.0, <=5.2.5)

webpack-dev-server NPM version =5.0.0, =5.0.0, =0.17.0, =0.17.0, =0.17.0, =8.0.0-next.2, =18.0.0-beta.3, =18.0.0-beta.3, =18.2.6-RC-1, =18.0.0, =18.0.0-next.0, =0.7.7, =1.0.5-beta.4, =1.0.1-beta.1, =0.18.3, =0.0.1, =0.3.2 and more Source cves: CVE-2026-14631 Source advisory:...

Cross-site Request Forgery (CSRF)

Overview webpack-dev-server is an Uses webpack with a development server that provides live reloading. It should be used for development only. Affected versions of this package are vulnerable to Cross-site Request Forgery CSRF via the open-editor and invalidate endpoints. An attacker can open...

Cross-site Request Forgery (CSRF)

Overview org.webjars.npm:webpack-dev-server is an Uses webpack with a development server that provides live reloading. It should be used for development only. Affected versions of this package are vulnerable to Cross-site Request Forgery CSRF via the open-editor and invalidate endpoints. An...

@4399ywkf/core (>=5.0.0, <=5.0.32), @all-star/base (>=0.17.0, <=0.18.2) +323 more potentially affected by CVE-2026-14620 via webpack-dev-server (>=5.0.0, <=5.2.5)

webpack-dev-server NPM version =5.0.0, =5.0.0, =0.17.0, =0.17.0, =0.17.0, =8.0.0-next.2, =18.0.0-beta.3, =18.0.0-beta.3, =18.2.6-RC-1, =18.0.0, =18.0.0-next.0, =0.7.7, =1.0.5-beta.4, =1.0.1-beta.1, =0.18.3, =0.0.1, =0.3.2 and more Source cves: CVE-2026-14620 Source advisory:...