CVE-2026-14620

A flaw was found in webpack-dev-server. This vulnerability allows a remote attacker to exploit exposed internal developer endpoints, /webpack-dev-server/open-editor and /webpack-dev-server/invalidate, through cross-origin requests. By visiting a malicious website while the development server is active, an attacker can open arbitrary local files in the developer's editor, including those outside the project directory. Repeated exploitation can lead to a denial of service by spawning numerous editor processes and forcing recompilations, degrading the developer's system performance.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.