{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-114348 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-114348 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-114348 is a medium-severity vulnerability in webpack-dev-server, published on 22 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-114348 and fix it if it is affected.\n\nWhat it is: CVE-2026-114348 is a medium-severity vulnerability in webpack-dev-server, published on 22 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-114348 in the wild and no public exploit code.\n\nAffected product: webpack-dev-server. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-114348/ (Markdown: https://insights.sbomify.com/CVE-2026-114348/index.md)","id":"CVE-2026-114348","markdown":"https://insights.sbomify.com/CVE-2026-114348/index.md","name":"CVE-2026-114348","record":{"aliases":["GHSA-wqhc-fvfg-56q6","UBUNTU-CVE-2026-114348"],"analysis":null,"analysis_generated_by":null,"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:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-209","name":"Generation of Error Message Containing Sensitive Information"},{"id":"CWE-1289","name":"Improper Validation of Unsafe Equivalence in Input"}],"description":"webpack-dev-server is a development server that provides live reloading for webpack projects. In versions from 5.1.0 before 5.2.7 and in version 6.0.0, the unauthenticated open-editor endpoint validates the Host header with a regular expression meant for browser Origin schemes, so a Host value beginning with file: or with an extension scheme short-circuits the hostname and allowedHosts checks. A network peer that can reach the dev server can send a request with a malformed Host that passes validation and then causes the endpoint's URL construction to throw, and in the default non-production mode the server returns an HTTP 500 body containing the full exception stack trace, which discloses absolute filesystem paths, installed module locations, and internal source line numbers. The server keeps running, so there is no denial of service. The issue is fixed in webpack-dev-server 5.2.7 and 6.1.0, and users should upgrade to one of those versions or later.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"webpack-dev-server vulnerable to information disclosure via Host validation bypass in the open-editor endpoint","id":"CVE-2026-114348","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Apache Kafka: Denial of service via unbounded memory allocation when decoding compressed record batches","id":"CVE-2026-114349"},"packages":[],"prev":{"headline":"Unauthenticated Command Injection via kubeconfig Username in che-machine-exec","id":"CVE-2026-114278"},"products":["webpack-dev-server"],"published":"2026-10-22","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 denial of service via a malformed Host or Origin header","id":"CVE-2026-14631","kev_date_added":null,"published":"2026-07-03"},{"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":"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":"2026-10-22","vendors":["webpack-dev-server"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-114348/"}