Npm · Webpack-Dev-Server · CVE-2026-14620
**Name of the Vulnerable Software and Affected Versions**
webpack-dev-server versions prior to 5.2.6
**Description**
Internal developer endpoints '/webpack-dev-server/open-editor' and '/webpack-dev-server/invalidate' perform state-changing actions on GET requests without verifying the request origin. This allows any website visited by a developer to trigger these endpoints cross-origin. An attacker can open arbitrary local files in the developer's editor, including those outside the project root. Additionally, repeated requests can spawn multiple editor processes and force recompilations, leading to system performance degradation.
**Recommendations**
Upgrade to webpack-dev-server 5.2.6.