{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-6402", "assignerOrgId": "ce714d77-add3-4f53-aff5-83d477b104bb", "state": "PUBLISHED", "assignerShortName": "openjs", "dateReserved": "2026-04-15T20:35:29.271Z", "datePublished": "2026-05-12T07:45:21.253Z", "dateUpdated": "2026-05-12T13:00:06.847Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "ce714d77-add3-4f53-aff5-83d477b104bb", "shortName": "openjs", "dateUpdated": "2026-05-12T07:45:21.253Z"}, "descriptions": [{"lang": "en", "value": "webpack-dev-server versions up to and including 5.2.3 are vulnerable to cross-origin source code exposure when serving over a non-potentially trustworthy origin such as plain HTTP. The previous fix relied on the Sec-Fetch-Mode and Sec-Fetch-Site request headers, which browsers omit for non-trustworthy origins, allowing a malicious site to load the bundled source as a script and read it across origins. Impact: an attacker controlling a website visited by a developer running webpack-dev-server can recover the application source code when the dev server runs over HTTP at a guessable host and port. Chromium based browsers from Chrome 142 onward are not affected due to local network access restrictions. Upgrade to webpack-dev-server 5.2.4 or later, which sets Cross-Origin-Resource-Policy: same-origin on responses.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "webpack-dev-server versions up to and including 5.2.3 are vulnerable to cross-origin source code exposure when serving over a non-potentially trustworthy origin such as plain HTTP. The previous fix relied on the Sec-Fetch-Mode and Sec-Fetch-Site request headers, which browsers omit for non-trustworthy origins, allowing a malicious site to load the bundled source as a script and read it across origins. Impact: an attacker controlling a website visited by a developer running webpack-dev-server can recover the application source code when the dev server runs over HTTP at a guessable host and port. Chromium based browsers from Chrome 142 onward are not affected due to local network access restrictions. Upgrade to webpack-dev-server 5.2.4 or later, which sets Cross-Origin-Resource-Policy: same-origin on responses."}]}], "affected": [{"vendor": "webpack-dev-server", "product": "webpack-dev-server", "defaultStatus": "unaffected", "versions": [{"versionType": "semver", "status": "affected", "version": "0", "lessThan": "5.2.4"}, {"versionType": "semver", "status": "unaffected", "version": "5.2.4"}], "packageURL": "pkg:npm/webpack-dev-server"}], "references": [{"url": "https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-79cf-xcqc-c78w"}, {"url": "https://cna.openjsf.org/security-advisories.html"}], "credits": [{"lang": "en", "type": "reporter", "value": "sapphi-red"}, {"lang": "en", "type": "remediation developer", "value": "Ulises Gasc\u00f3n"}, {"lang": "en", "type": "remediation developer", "value": "Sebastian Beltran"}, {"lang": "en", "type": "remediation reviewer", "value": "Alexander Akait"}], "title": "webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins", "metrics": [{"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-749", "lang": "en", "description": "CWE-749: Exposed Dangerous Method or Function", "type": "CWE"}]}], "x_generator": {"engine": "cve-kit 1.0.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-12T12:57:17.986993Z", "id": "CVE-2026-6402", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-12T13:00:06.847Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-6402", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-12T12:57:17.986993Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-12T12:58:56.596Z"}}], "cna": {"title": "webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins", "credits": [{"lang": "en", "type": "reporter", "value": "sapphi-red"}, {"lang": "en", "type": "remediation developer", "value": "Ulises Gasc\u00f3n"}, {"lang": "en", "type": "remediation developer", "value": "Sebastian Beltran"}, {"lang": "en", "type": "remediation reviewer", "value": "Alexander Akait"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"version": "3.1", "baseScore": 5.3, "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "webpack-dev-server", "product": "webpack-dev-server", "versions": [{"status": "affected", "version": "0", "lessThan": "5.2.4", "versionType": "semver"}, {"status": "unaffected", "version": "5.2.4", "versionType": "semver"}], "packageURL": "pkg:npm/webpack-dev-server", "defaultStatus": "unaffected"}], "references": [{"url": "https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-79cf-xcqc-c78w"}, {"url": "https://cna.openjsf.org/security-advisories.html"}], "x_generator": {"engine": "cve-kit 1.0.0"}, "descriptions": [{"lang": "en", "value": "webpack-dev-server versions up to and including 5.2.3 are vulnerable to cross-origin source code exposure when serving over a non-potentially trustworthy origin such as plain HTTP. The previous fix relied on the Sec-Fetch-Mode and Sec-Fetch-Site request headers, which browsers omit for non-trustworthy origins, allowing a malicious site to load the bundled source as a script and read it across origins. Impact: an attacker controlling a website visited by a developer running webpack-dev-server can recover the application source code when the dev server runs over HTTP at a guessable host and port. Chromium based browsers from Chrome 142 onward are not affected due to local network access restrictions. Upgrade to webpack-dev-server 5.2.4 or later, which sets Cross-Origin-Resource-Policy: same-origin on responses.", "supportingMedia": [{"type": "text/html", "value": "webpack-dev-server versions up to and including 5.2.3 are vulnerable to cross-origin source code exposure when serving over a non-potentially trustworthy origin such as plain HTTP. The previous fix relied on the Sec-Fetch-Mode and Sec-Fetch-Site request headers, which browsers omit for non-trustworthy origins, allowing a malicious site to load the bundled source as a script and read it across origins. Impact: an attacker controlling a website visited by a developer running webpack-dev-server can recover the application source code when the dev server runs over HTTP at a guessable host and port. Chromium based browsers from Chrome 142 onward are not affected due to local network access restrictions. Upgrade to webpack-dev-server 5.2.4 or later, which sets Cross-Origin-Resource-Policy: same-origin on responses.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-749", "description": "CWE-749: Exposed Dangerous Method or Function"}]}], "providerMetadata": {"orgId": "ce714d77-add3-4f53-aff5-83d477b104bb", "shortName": "openjs", "dateUpdated": "2026-05-12T07:45:21.253Z"}}}, "cveMetadata": {"cveId": "CVE-2026-6402", "state": "PUBLISHED", "dateUpdated": "2026-05-12T13:00:06.847Z", "dateReserved": "2026-04-15T20:35:29.271Z", "assignerOrgId": "ce714d77-add3-4f53-aff5-83d477b104bb", "datePublished": "2026-05-12T07:45:21.253Z", "assignerShortName": "openjs"}, "dataVersion": "5.2"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "webpack-dev-server versions up to and including 5.2.3 are vulnerable to cross-origin source code exposure when serving over a non-potentially trustworthy origin such as plain HTTP. The previous fix relied on the Sec-Fetch-Mode and Sec-Fetch-Site request headers, which browsers omit for non-trustworthy origins, allowing a malicious site to load the bundled source as a script and read it across origins. Impact: an attacker controlling a website visited by a developer running webpack-dev-server can recover the application source code when the dev server runs over HTTP at a guessable host and port. Chromium based browsers from Chrome 142 onward are not affected due to local network access restrictions. Upgrade to webpack-dev-server 5.2.4 or later, which sets Cross-Origin-Resource-Policy: same-origin on responses."}], "id": "CVE-2026-6402", "lastModified": "2026-05-12T15:08:22.857", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 3.6, "source": "ce714d77-add3-4f53-aff5-83d477b104bb", "type": "Secondary"}]}, "published": "2026-05-12T09:16:55.640", "references": [{"source": "ce714d77-add3-4f53-aff5-83d477b104bb", "url": "https://cna.openjsf.org/security-advisories.html"}, {"source": "ce714d77-add3-4f53-aff5-83d477b104bb", "url": "https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-79cf-xcqc-c78w"}], "sourceIdentifier": "ce714d77-add3-4f53-aff5-83d477b104bb", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-749"}], "source": "ce714d77-add3-4f53-aff5-83d477b104bb", "type": "Secondary"}]}

{"bugzilla": {"description": "webpack-dev-server: webpack-dev-server: Information disclosure due to cross-origin source code exposure", "id": "2476411", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2476411"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-346", "details": ["A flaw was found in webpack-dev-server. When the development server operates over plain HTTP, a remote attacker can exploit a cross-origin source code exposure vulnerability. This allows a malicious website, visited by a developer, to load the bundled application source code as a script and read it across origins. Consequently, this could lead to the disclosure of sensitive application source code."], "name": "CVE-2026-6402", "package_state": [{"cpe": "cpe:/a:redhat:cryostat:4", "fix_state": "Fix deferred", "package_name": "cryostat-openshift-console-plugin-npm", "product_name": "Cryostat 4"}, {"cpe": "cpe:/a:redhat:cryostat:4", "fix_state": "Fix deferred", "package_name": "webpack-dev-server", "product_name": "Cryostat 4"}, {"cpe": "cpe:/a:redhat:gatekeeper:3", "fix_state": "Fix deferred", "package_name": "gatekeeper/gatekeeper-rhel9", "product_name": "Gatekeeper 3"}, {"cpe": "cpe:/a:redhat:rhmt:1", "fix_state": "Fix deferred", "package_name": "rhmtc/openshift-migration-ui-rhel8", "product_name": "Migration Toolkit for Containers"}, {"cpe": "cpe:/a:redhat:workload_availability_nhc:0", "fix_state": "Fix deferred", "package_name": "workload-availability/node-healthcheck-must-gather-rhel9", "product_name": "Node HealthCheck Operator"}, {"cpe": "cpe:/a:redhat:workload_availability_nhc:0", "fix_state": "Fix deferred", "package_name": "workload-availability/node-healthcheck-operator-bundle", "product_name": "Node HealthCheck Operator"}, {"cpe": "cpe:/a:redhat:workload_availability_nhc:0", "fix_state": "Fix deferred", "package_name": "workload-availability/node-healthcheck-rhel9-operator", "product_name": "Node HealthCheck Operator"}, {"cpe": "cpe:/a:redhat:openshift_lightspeed", "fix_state": "Fix deferred", "package_name": "openshift-lightspeed/lightspeed-console-plugin-419-rhel9", "product_name": "OpenShift Lightspeed"}, {"cpe": "cpe:/a:redhat:openshift_lightspeed", "fix_state": "Fix deferred", "package_name": "openshift-lightspeed/lightspeed-console-plugin-pf5-rhel9", "product_name": "OpenShift Lightspeed"}, {"cpe": "cpe:/a:redhat:openshift_lightspeed", "fix_state": "Fix deferred", "package_name": "openshift-lightspeed/lightspeed-console-plugin-rhel9", "product_name": "OpenShift Lightspeed"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Fix deferred", "package_name": "openshift-pipelines/pipelines-console-plugin-rhel8", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Fix deferred", "package_name": "openshift-pipelines/pipelines-console-plugin-rhel9", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Fix deferred", "package_name": "openshift-pipelines/pipelines-hub-ui-rhel8", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Fix deferred", "package_name": "openshift-pipelines/pipelines-hub-ui-rhel9", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:service_mesh:2", "fix_state": "Fix deferred", "package_name": "openshift-service-mesh/kiali-ossmc-rhel8", "product_name": "OpenShift Service Mesh 2"}, {"cpe": "cpe:/a:redhat:service_mesh:2", "fix_state": "Fix deferred", "package_name": "openshift-service-mesh/kiali-rhel8", "product_name": "OpenShift Service Mesh 2"}, {"cpe": "cpe:/a:redhat:service_mesh:3", "fix_state": "Fix deferred", "package_name": "openshift-service-mesh/kiali-operator-bundle", "product_name": "OpenShift Service Mesh 3"}, {"cpe": "cpe:/a:redhat:service_mesh:3", "fix_state": "Fix deferred", "package_name": "openshift-service-mesh/kiali-ossmc-rhel9", "product_name": "OpenShift Service Mesh 3"}, {"cpe": "cpe:/a:redhat:service_mesh:3", "fix_state": "Fix deferred", "package_name": "openshift-service-mesh/kiali-rhel9", "product_name": "OpenShift Service Mesh 3"}, {"cpe": "cpe:/a:redhat:service_mesh:3", "fix_state": "Fix deferred", "package_name": "openshift-service-mesh/kiali-rhel9-operator", "product_name": "OpenShift Service Mesh 3"}, {"cpe": "cpe:/a:redhat:amq_broker:7", "fix_state": "Fix deferred", "package_name": "webpack-dev-server", "product_name": "Red Hat AMQ Broker 7"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-24/lightspeed-rhel8", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-25/lightspeed-rhel8", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-26/gateway-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-26/lightspeed-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "automation-eda-controller", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:camel_spring_boot:4", "fix_state": "Fix deferred", "package_name": "webpack-dev-server", "product_name": "Red Hat build of Apache Camel for Spring Boot 4"}, {"cpe": "cpe:/a:redhat:apache_camel_hawtio:4", "fix_state": "Fix deferred", "package_name": "webpack-dev-server", "product_name": "Red Hat build of Apache Camel - HawtIO 4"}, {"cpe": "cpe:/a:redhat:service_registry:2", "fix_state": "Fix deferred", "package_name": "webpack-dev-server", "product_name": "Red Hat build of Apicurio Registry 2"}, {"cpe": "cpe:/a:redhat:podman_desktop:1", "fix_state": "Fix deferred", "package_name": "rh-podman-desktop.git", "product_name": "Red Hat Build of Podman Desktop"}, {"cpe": "cpe:/a:redhat:jboss_data_grid:8", "fix_state": "Fix deferred", "package_name": "webpack-dev-server", "product_name": "Red Hat Data Grid 8"}, {"cpe": "cpe:/a:redhat:rhdh:1", "fix_state": "Fix deferred", "package_name": "rhdh/rhdh-hub-rhel9", "product_name": "Red Hat Developer Hub"}, {"cpe": "cpe:/a:redhat:discovery:2::el9", "fix_state": "Fix deferred", "package_name": "discovery/discovery-ui-rhel9", "product_name": "Red Hat Discovery 2"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "grafana", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "js-d3-flame-graph", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "pcs", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "grafana", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "pcs", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "grafana", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "js-d3-flame-graph", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "pcs", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Fix deferred", "package_name": "rhelai3/bootc-cuda-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Fix deferred", "package_name": "rhelai3/bootc-rocm-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Fix deferred", "package_name": "rhelai3/disk-image-cuda-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Fix deferred", "package_name": "webpack-dev-server", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-mlflow-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-console-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Fix deferred", "package_name": "container-native-virtualization/kubevirt-console-plugin", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Fix deferred", "package_name": "container-native-virtualization/kubevirt-console-plugin-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_bpms_platform:7", "fix_state": "Fix deferred", "package_name": "webpack-dev-server", "product_name": "Red Hat Process Automation 7"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Fix deferred", "package_name": "quay/quay-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:ansible_portal:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform/automation-portal", "product_name": "Self-service automation portal 2"}], "public_date": "2026-05-12T07:45:21Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-6402\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-6402\nhttps://cna.openjsf.org/security-advisories.html\nhttps://github.com/webpack/webpack-dev-server/security/advisories/GHSA-79cf-xcqc-c78w"], "threat_severity": "Moderate"}

{"created": "2026-05-12T11:00:07.253441+00:00", "updated": "2026-05-13T02:30:16.244186+00:00", "vendors": []}