Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-07-03T17:00:00 webpack-dev-server: webpack-dev-server: Arbitrary file opening and denial of service via exposed developer endpoints 4.7 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:L CWE-940

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 website a developer visits while the dev server is running can trigger these endpoints cross-origin with no interaction beyond the visit. An attacker can open an arbitrary existing local file in the developer's editor, including files outside the project root, and repeated requests can spawn editor processes and force recompilations that degrade the developer's machine. Patches: upgrade to webpack-dev-server 5.2.6. Workarounds: none.

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.

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. Cryostat 4 Fix deferred cryostat-openshift-console-plugin-npm Cryostat 4 Fix deferred webpack-dev-server Gatekeeper 3 Fix deferred gatekeeper/gatekeeper-rhel9 Migration Toolkit for Containers Fix deferred rhmtc/openshift-migration-ui-rhel8 Node HealthCheck Operator Fix deferred workload-availability/node-healthcheck-must-gather-rhel9 Node HealthCheck Operator Fix deferred workload-availability/node-healthcheck-operator-bundle Node HealthCheck Operator Fix deferred workload-availability/node-healthcheck-rhel9-operator OpenShift Lightspeed Fix deferred openshift-lightspeed/lightspeed-console-plugin-419-rhel9 OpenShift Lightspeed Fix deferred openshift-lightspeed/lightspeed-console-plugin-pf5-rhel9 OpenShift Lightspeed Fix deferred openshift-lightspeed/lightspeed-console-plugin-rhel9 OpenShift Pipelines Fix deferred openshift-pipelines/pipelines-console-plugin-pf5-rhel9 OpenShift Pipelines Fix deferred openshift-pipelines/pipelines-console-plugin-rhel8 OpenShift Pipelines Fix deferred openshift-pipelines/pipelines-console-plugin-rhel9 OpenShift Pipelines Fix deferred openshift-pipelines/pipelines-hub-ui-rhel8 OpenShift Pipelines Fix deferred openshift-pipelines/pipelines-hub-ui-rhel9 OpenShift Service Mesh 3 Fix deferred openshift-service-mesh/kiali-operator-bundle OpenShift Service Mesh 3 Fix deferred openshift-service-mesh/kiali-ossmc-rhel9 OpenShift Service Mesh 3 Fix deferred openshift-service-mesh/kiali-rhel9 OpenShift Service Mesh 3 Fix deferred openshift-service-mesh/kiali-rhel9-operator Red Hat AMQ Broker 7 Fix deferred webpack-dev-server Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-24/lightspeed-rhel8 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-25/lightspeed-rhel8 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-26/gateway-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-26/lightspeed-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-27/gateway-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-27/lightspeed-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred automation-eda-controller Red Hat build of Apache Camel for Spring Boot 4 Fix deferred webpack-dev-server Red Hat build of Apache Camel - HawtIO 4 Fix deferred webpack-dev-server Red Hat Build of Podman Desktop Fix deferred rh-podman-desktop.git Red Hat Connectivity Link 1 Fix deferred rhcl-1/rhcl-console-plugin-rhel9 Red Hat Data Grid 8 Fix deferred webpack-dev-server Red Hat Developer Hub Fix deferred rhdh/rhdh-hub-rhel9 Red Hat Discovery 2 Fix deferred discovery/discovery-ui-rhel9 Red Hat Enterprise Linux 10 Fix deferred grafana Red Hat Enterprise Linux 10 Fix deferred js-d3-flame-graph Red Hat Enterprise Linux 10 Fix deferred pcs Red Hat Enterprise Linux 8 Fix deferred grafana Red Hat Enterprise Linux 8 Fix deferred js-d3-flame-graph Red Hat Enterprise Linux 8 Fix deferred pcs Red Hat Enterprise Linux 9 Fix deferred grafana Red Hat Enterprise Linux 9 Fix deferred js-d3-flame-graph Red Hat Enterprise Linux 9 Fix deferred pcs Red Hat Enterprise Linux AI (RHEL AI) 3 Fix deferred rhelai3/bootc-cuda-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Fix deferred rhelai3/bootc-gaudi-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Fix deferred rhelai3/bootc-rocm-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Fix deferred rhelai3/disk-image-cuda-rhel9 Red Hat OpenShift AI (RHOAI) Fix deferred rhoai/odh-mlflow-rhel9 Red Hat OpenShift Container Platform 4 Fix deferred openshift4/ose-agent-installer-ui-rhel9 Red Hat OpenShift Container Platform 4 Fix deferred openshift4/ose-console Red Hat OpenShift Container Platform 4 Fix deferred openshift4/ose-console-rhel9 Red Hat OpenShift Virtualization 4 Fix deferred container-native-virtualization/kubevirt-console-plugin Red Hat OpenShift Virtualization 4 Fix deferred container-native-virtualization/kubevirt-console-plugin-rhel9 Red Hat Quay 3 Fix deferred quay/quay-rhel8 Self-service automation portal 2 Fix deferred ansible-automation-platform/automation-portal https://www.cve.org/CVERecord?id=CVE-2026-14620 https://nvd.nist.gov/vuln/detail/CVE-2026-14620 https://cna.openjsf.org/security-advisories.html https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-f5vj-f2hx-8m93