{
  "threat_severity" : "Important",
  "public_date" : "2026-06-15T15:00:21Z",
  "bugzilla" : {
    "description" : "webpack-dev-server: webpack-dev-server: Information disclosure and denial of service via improper proxy configuration",
    "id" : "2488934",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2488934"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.1",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L",
    "status" : "verified"
  },
  "cwe" : "CWE-346",
  "details" : [ "Impact: When a user-configured proxy on webpack-dev-server has a broad context (e.g. /) and ws: true, it also intercepts the dev server's own HMR WebSocket and forwards it to the proxy target. This leaks the browser's cookies and Origin header to the backend, bypasses the dev server's Host/Origin validation, and corrupts the HMR socket (both HMR and the proxy end up writing to the same socket).\nPatches: Fixed in webpack-dev-server@5.2.5.\nWorkarounds: Scope user-defined proxy context to specific paths instead of /, or omit ws: true from the proxy entry when WebSocket forwarding is not required.", "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 cookies and Origin header to the proxy target, bypassing the server's Host/Origin validation. Additionally, it can corrupt the HMR socket, resulting in a denial of service for the HMR functionality." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Data Grid 8.6.2",
    "release_date" : "2026-07-20T00:00:00Z",
    "advisory" : "RHSA-2026:41951",
    "cpe" : "cpe:/a:redhat:jboss_data_grid:8",
    "package" : "webpack-dev-server"
  }, {
    "product_name" : "Red Hat Migration Toolkit 1.8",
    "release_date" : "2026-07-20T00:00:00Z",
    "advisory" : "RHSA-2026:41928",
    "cpe" : "cpe:/a:redhat:rhmt:1.8::el8",
    "package" : "rhmtc/openshift-migration-ui-rhel8:1783690532"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4.20",
    "release_date" : "2026-07-14T00:00:00Z",
    "advisory" : "RHSA-2026:37628",
    "cpe" : "cpe:/a:redhat:openshift:4.20::el9",
    "package" : "openshift4/ose-console-rhel9:1783602326"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4.21",
    "release_date" : "2026-07-14T00:00:00Z",
    "advisory" : "RHSA-2026:37186",
    "cpe" : "cpe:/a:redhat:openshift:4.21::el9",
    "package" : "openshift4/ose-console-rhel9:1783502338"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4.22",
    "release_date" : "2026-07-07T00:00:00Z",
    "advisory" : "RHSA-2026:34794",
    "cpe" : "cpe:/a:redhat:openshift:4.22::el9",
    "package" : "openshift4/ose-console-rhel9:1782913621"
  } ],
  "package_state" : [ {
    "product_name" : "Cryostat 4",
    "fix_state" : "Not affected",
    "package_name" : "cryostat-openshift-console-plugin-npm",
    "cpe" : "cpe:/a:redhat:cryostat:4"
  }, {
    "product_name" : "Cryostat 4",
    "fix_state" : "Not affected",
    "package_name" : "webpack-dev-server",
    "cpe" : "cpe:/a:redhat:cryostat:4"
  }, {
    "product_name" : "Gatekeeper 3",
    "fix_state" : "Affected",
    "package_name" : "gatekeeper/gatekeeper-rhel9",
    "cpe" : "cpe:/a:redhat:gatekeeper:3"
  }, {
    "product_name" : "Node HealthCheck Operator",
    "fix_state" : "Affected",
    "package_name" : "workload-availability/node-healthcheck-must-gather-rhel9",
    "cpe" : "cpe:/a:redhat:workload_availability_nhc:0"
  }, {
    "product_name" : "Node HealthCheck Operator",
    "fix_state" : "Affected",
    "package_name" : "workload-availability/node-healthcheck-operator-bundle",
    "cpe" : "cpe:/a:redhat:workload_availability_nhc:0"
  }, {
    "product_name" : "Node HealthCheck Operator",
    "fix_state" : "Affected",
    "package_name" : "workload-availability/node-healthcheck-rhel9-operator",
    "cpe" : "cpe:/a:redhat:workload_availability_nhc:0"
  }, {
    "product_name" : "OpenShift Lightspeed",
    "fix_state" : "Affected",
    "package_name" : "openshift-lightspeed/lightspeed-console-plugin-419-rhel9",
    "cpe" : "cpe:/a:redhat:openshift_lightspeed"
  }, {
    "product_name" : "OpenShift Lightspeed",
    "fix_state" : "Affected",
    "package_name" : "openshift-lightspeed/lightspeed-console-plugin-pf5-rhel9",
    "cpe" : "cpe:/a:redhat:openshift_lightspeed"
  }, {
    "product_name" : "OpenShift Lightspeed",
    "fix_state" : "Affected",
    "package_name" : "openshift-lightspeed/lightspeed-console-plugin-rhel9",
    "cpe" : "cpe:/a:redhat:openshift_lightspeed"
  }, {
    "product_name" : "OpenShift Pipelines",
    "fix_state" : "Affected",
    "package_name" : "openshift-pipelines/pipelines-console-plugin-pf5-rhel9",
    "cpe" : "cpe:/a:redhat:openshift_pipelines:1"
  }, {
    "product_name" : "OpenShift Pipelines",
    "fix_state" : "Affected",
    "package_name" : "openshift-pipelines/pipelines-console-plugin-rhel8",
    "cpe" : "cpe:/a:redhat:openshift_pipelines:1"
  }, {
    "product_name" : "OpenShift Pipelines",
    "fix_state" : "Affected",
    "package_name" : "openshift-pipelines/pipelines-console-plugin-rhel9",
    "cpe" : "cpe:/a:redhat:openshift_pipelines:1"
  }, {
    "product_name" : "OpenShift Pipelines",
    "fix_state" : "Affected",
    "package_name" : "openshift-pipelines/pipelines-hub-ui-rhel8",
    "cpe" : "cpe:/a:redhat:openshift_pipelines:1"
  }, {
    "product_name" : "OpenShift Pipelines",
    "fix_state" : "Affected",
    "package_name" : "openshift-pipelines/pipelines-hub-ui-rhel9",
    "cpe" : "cpe:/a:redhat:openshift_pipelines:1"
  }, {
    "product_name" : "OpenShift Service Mesh 2",
    "fix_state" : "Not affected",
    "package_name" : "openshift-service-mesh/kiali-ossmc-rhel8",
    "cpe" : "cpe:/a:redhat:service_mesh:2"
  }, {
    "product_name" : "OpenShift Service Mesh 2",
    "fix_state" : "Not affected",
    "package_name" : "openshift-service-mesh/kiali-rhel8",
    "cpe" : "cpe:/a:redhat:service_mesh:2"
  }, {
    "product_name" : "OpenShift Service Mesh 3",
    "fix_state" : "Not affected",
    "package_name" : "openshift-service-mesh/kiali-operator-bundle",
    "cpe" : "cpe:/a:redhat:service_mesh:3"
  }, {
    "product_name" : "OpenShift Service Mesh 3",
    "fix_state" : "Not affected",
    "package_name" : "openshift-service-mesh/kiali-ossmc-rhel9",
    "cpe" : "cpe:/a:redhat:service_mesh:3"
  }, {
    "product_name" : "OpenShift Service Mesh 3",
    "fix_state" : "Not affected",
    "package_name" : "openshift-service-mesh/kiali-rhel9",
    "cpe" : "cpe:/a:redhat:service_mesh:3"
  }, {
    "product_name" : "OpenShift Service Mesh 3",
    "fix_state" : "Not affected",
    "package_name" : "openshift-service-mesh/kiali-rhel9-operator",
    "cpe" : "cpe:/a:redhat:service_mesh:3"
  }, {
    "product_name" : "Red Hat AMQ Broker 7",
    "fix_state" : "Affected",
    "package_name" : "webpack-dev-server",
    "cpe" : "cpe:/a:redhat:amq_broker:7"
  }, {
    "product_name" : "Red Hat Ansible Automation Platform 2",
    "fix_state" : "Affected",
    "package_name" : "ansible-automation-platform-24/lightspeed-rhel8",
    "cpe" : "cpe:/a:redhat:ansible_automation_platform:2"
  }, {
    "product_name" : "Red Hat Ansible Automation Platform 2",
    "fix_state" : "Affected",
    "package_name" : "ansible-automation-platform-25/lightspeed-rhel8",
    "cpe" : "cpe:/a:redhat:ansible_automation_platform:2"
  }, {
    "product_name" : "Red Hat Ansible Automation Platform 2",
    "fix_state" : "Affected",
    "package_name" : "ansible-automation-platform-26/gateway-rhel9",
    "cpe" : "cpe:/a:redhat:ansible_automation_platform:2"
  }, {
    "product_name" : "Red Hat Ansible Automation Platform 2",
    "fix_state" : "Affected",
    "package_name" : "ansible-automation-platform-26/lightspeed-rhel9",
    "cpe" : "cpe:/a:redhat:ansible_automation_platform:2"
  }, {
    "product_name" : "Red Hat Ansible Automation Platform 2",
    "fix_state" : "Affected",
    "package_name" : "ansible-automation-platform-27/gateway-rhel9",
    "cpe" : "cpe:/a:redhat:ansible_automation_platform:2"
  }, {
    "product_name" : "Red Hat Ansible Automation Platform 2",
    "fix_state" : "Affected",
    "package_name" : "ansible-automation-platform-27/lightspeed-rhel9",
    "cpe" : "cpe:/a:redhat:ansible_automation_platform:2"
  }, {
    "product_name" : "Red Hat Ansible Automation Platform 2",
    "fix_state" : "Affected",
    "package_name" : "automation-eda-controller",
    "cpe" : "cpe:/a:redhat:ansible_automation_platform:2"
  }, {
    "product_name" : "Red Hat build of Apache Camel for Spring Boot 4",
    "fix_state" : "Not affected",
    "package_name" : "webpack-dev-server",
    "cpe" : "cpe:/a:redhat:camel_spring_boot:4"
  }, {
    "product_name" : "Red Hat build of Apache Camel - HawtIO 4",
    "fix_state" : "Affected",
    "package_name" : "webpack-dev-server",
    "cpe" : "cpe:/a:redhat:apache_camel_hawtio:4"
  }, {
    "product_name" : "Red Hat Build of Podman Desktop",
    "fix_state" : "Affected",
    "package_name" : "rh-podman-desktop.git",
    "cpe" : "cpe:/a:redhat:podman_desktop:1"
  }, {
    "product_name" : "Red Hat Connectivity Link 1",
    "fix_state" : "Affected",
    "package_name" : "rhcl-1/rhcl-console-plugin-rhel9",
    "cpe" : "cpe:/a:redhat:connectivity_link:1"
  }, {
    "product_name" : "Red Hat Developer Hub",
    "fix_state" : "Not affected",
    "package_name" : "rhdh/rhdh-hub-rhel9",
    "cpe" : "cpe:/a:redhat:rhdh:1"
  }, {
    "product_name" : "Red Hat Discovery 2",
    "fix_state" : "Affected",
    "package_name" : "discovery/discovery-ui-rhel9",
    "cpe" : "cpe:/a:redhat:discovery:2::el9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Affected",
    "package_name" : "grafana",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Affected",
    "package_name" : "js-d3-flame-graph",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Affected",
    "package_name" : "pcs",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "dotnet5.0-build-reference-packages",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "grafana",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "js-d3-flame-graph",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "pcs",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "grafana",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "js-d3-flame-graph",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "pcs",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Will not fix",
    "package_name" : "rhelai3/bootc-cuda-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Will not fix",
    "package_name" : "rhelai3/bootc-gaudi-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Will not fix",
    "package_name" : "rhelai3/bootc-rocm-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Will not fix",
    "package_name" : "rhelai3/disk-image-cuda-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  }, {
    "product_name" : "Red Hat Fuse 7",
    "fix_state" : "Not affected",
    "package_name" : "webpack-dev-server",
    "cpe" : "cpe:/a:redhat:jboss_fuse:7"
  }, {
    "product_name" : "Red Hat OpenShift AI (RHOAI)",
    "fix_state" : "Not affected",
    "package_name" : "rhoai/odh-mlflow-rhel9",
    "cpe" : "cpe:/a:redhat:openshift_ai"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4",
    "fix_state" : "Affected",
    "package_name" : "openshift4/ose-agent-installer-ui-rhel9",
    "cpe" : "cpe:/a:redhat:openshift:4"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4",
    "fix_state" : "Not affected",
    "package_name" : "openshift4/ose-console",
    "cpe" : "cpe:/a:redhat:openshift:4"
  }, {
    "product_name" : "Red Hat OpenShift Virtualization 4",
    "fix_state" : "Not affected",
    "package_name" : "container-native-virtualization/kubevirt-console-plugin",
    "cpe" : "cpe:/a:redhat:container_native_virtualization:4"
  }, {
    "product_name" : "Red Hat OpenShift Virtualization 4",
    "fix_state" : "Not affected",
    "package_name" : "container-native-virtualization/kubevirt-console-plugin-rhel9",
    "cpe" : "cpe:/a:redhat:container_native_virtualization:4"
  }, {
    "product_name" : "Red Hat Quay 3",
    "fix_state" : "Will not fix",
    "package_name" : "quay/quay-rhel8",
    "cpe" : "cpe:/a:redhat:quay:3"
  }, {
    "product_name" : "Self-service automation portal 2",
    "fix_state" : "Affected",
    "package_name" : "ansible-automation-platform/automation-portal",
    "cpe" : "cpe:/a:redhat:ansible_portal:2"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-9595\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-9595\nhttps://cna.openjsf.org/security-advisories.html\nhttps://github.com/facebook/create-react-app/pull/7444\nhttps://github.com/vuejs/vue-cli/commit/72ba7505aff2a8314e82aa5082379a77504a1fcb\nhttps://github.com/webpack/webpack-dev-server/pull/4316\nhttps://github.com/webpack/webpack-dev-server/security/advisories/GHSA-mx8g-39q3-5c79" ],
  "name" : "CVE-2026-9595",
  "mitigation" : {
    "value" : "To mitigate this issue, users should avoid configuring `webpack-dev-server` with a broad proxy context (e.g., `/`) when WebSocket forwarding (`ws: true`) is enabled. Instead, define specific paths for the proxy context. Alternatively, disable WebSocket forwarding by omitting `ws: true` from the proxy entry if WebSocket functionality is not required for the proxy target. This configuration change may require restarting the `webpack-dev-server` instance to take effect.",
    "lang" : "en:us"
  },
  "csaw" : false
}