{"answers":{"affected":"2 open source packages ship an affected version, including webpack-dev-server. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-14631 in the wild and no public exploit code.","fix":"Upgrade webpack-dev-server to 5.2.6 or later.","what":"CVE-2026-14631 is a medium-severity denial of service vulnerability in webpack-dev-server, published on 3 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-14631 and fix it if it is affected.\n\nWhat it is: CVE-2026-14631 is a medium-severity denial of service vulnerability in webpack-dev-server, published on 3 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-14631 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- webpack-dev-server (npm): affected all versions; fixed in 5.2.6\n- webpack-dev-server (npm): affected all versions; fixed in 5.2.6\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-14631/ (Markdown: https://insights.sbomify.com/CVE-2026-14631/index.md)","id":"CVE-2026-14631","markdown":"https://insights.sbomify.com/CVE-2026-14631/index.md","name":"CVE-2026-14631","record":{"aliases":["CLEANSTART-2026-ZE34863","CLSA-2026-1787823957","CLSA-2026-1787931162","GHSA-m28w-2pqf-7qgj","MINI-496g-v3w4-4j96","MINI-85cq-x37g-jc56","MINI-8q5m-hpj3-cfqj","MINI-fpfx-qqpr-7mrh","MINI-hhvq-m4f8-gjc5","MINI-xj6f-23q8-6wf8","ROOT-APP-NPM-CVE-2026-14631"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"webpack-dev-server","requires_auth":"none","summary":"An unauthenticated attacker can crash the webpack-dev-server process by sending malformed Host or Origin headers, causing a denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"openjs","cpe":[{"product":"webpack-dev-server","vendor":"webpack.js"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-248","name":"Uncaught Exception"},{"id":"CWE-20","name":"Improper Input Validation"}],"description":"webpack-dev-server versions 5.2.5 and earlier terminate the whole Node.js process when an unauthenticated peer sends either a normal HTTP request with a malformed Host header or a WebSocket upgrade to the default /ws endpoint with a malformed Origin header. The malformed value causes an uncaught exception in the host-validation path and crashes the dev server. Impact is limited to availability of the development server, no data disclosure, no code execution. Patches: upgrade to webpack-dev-server 5.2.6. Workarounds: keep the dev server bound to localhost (the default) and do not expose it to untrusted networks.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"webpack-dev-server vulnerable to denial of service via a malformed Host or Origin header","id":"CVE-2026-14631","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"kirilkirkov Ecommerce-CodeIgniter-Bootstrap Trusted Backend MY_Controller.php setReferrer redirect","id":"CVE-2026-14632"},"packages":[{"ecosystem":"npm","fixed":["5.2.6"],"introduced":["0"],"last_affected":[],"package":"webpack-dev-server","purl":null,"source":"GHSA-m28w-2pqf-7qgj"},{"ecosystem":"npm","fixed":["5.2.6"],"introduced":["0"],"last_affected":[],"package":"webpack-dev-server","purl":"pkg:npm/webpack-dev-server","source":"GHSA-m28w-2pqf-7qgj"}],"prev":{"headline":"ForceInjection AI-fundermentals Memory Recall smart_customer_service.py get_conversation_history weak hash","id":"CVE-2026-14630"},"products":["webpack-dev-server"],"published":"2026-07-03","related":[{"cvss_score":8.2,"headline":"webpack-dev-server vulnerable to cross-origin WebSocket access via proxied upgrades","id":"CVE-2026-112085","kev_date_added":null,"published":"2026-10-22"},{"cvss_score":7.5,"headline":"Missing Origin Validation in webpack-dev-server","id":"CVE-2018-14732","kev_date_added":null,"published":"2018-09-21"},{"cvss_score":6.5,"headline":"webpack-dev-server users' source code may be stolen when they access a malicious web site with non-Chromium based browser","id":"CVE-2025-30360","kev_date_added":null,"published":"2025-06-03"},{"cvss_score":5.3,"headline":"webpack-dev-server vulnerable to information disclosure via Host validation bypass in the open-editor endpoint","id":"CVE-2026-114348","kev_date_added":null,"published":"2026-10-22"},{"cvss_score":5.3,"headline":"webpack-dev-server vulnerable to HMR WebSocket interception via permissive user proxies","id":"CVE-2026-9595","kev_date_added":null,"published":"2026-06-15"},{"cvss_score":5.3,"headline":"webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins","id":"CVE-2026-6402","kev_date_added":null,"published":"2026-05-12"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-06","vendors":["webpack-dev-server"]},"summary":"An unauthenticated attacker can crash the webpack-dev-server process by sending malformed Host or Origin headers, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2026-14631/"}