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Workarounds: keep the dev server bound to localhost (the default) and do not expose it to untrusted networks.","state":0,"publishedAt":"2026-07-03T17:23:41.451+00:00","modifiedAt":"2026-07-06T15:54:11.285+00:00","affected":[{"ecosystem":"Vendor product","name":"webpack-dev-server","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"webpack-dev-server\",\n                    \"product\": \"webpack-dev-server\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.2.6\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"unaffected\",\n                            \"version\": \"5.2.6\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:npm/webpack-dev-server\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-m28w-2pqf-7qgj","https://cna.openjsf.org/security-advisories.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-14631","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-14631","identifiers":["CVE-2026-14631"]},"retained":false,"historicalAffected":[]},{"revision":"4cb8190d15644eecb368d9f4787a90c7","observedAt":"2026-11-15T07:32:38.71+00:00","statement":{"source":"euvd","id":"EUVD-2026-41559","aliases":["CVE-2026-14631","GHSA-m28w-2pqf-7qgj"],"title":"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 malform…","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. 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The malformed header triggers an uncaught exception in the host-validation path and crashes the dev server process.\n\n### Patches\n\nFixed in `webpack-dev-server` 5.2.6 by treating malformed `Host` and `Origin` header values as invalid rather than throwing (see [PR #5699](https://github.com/webpack/webpack-dev-server/pull/5699)).\n\n### Workarounds\n\nKeep the dev server bound to `localhost` (the default) and do not expose it to untrusted networks.","state":0,"publishedAt":"2026-07-20T22:02:31+00:00","modifiedAt":"2026-09-10T03:50:52.4559061+00:00","affected":[{"ecosystem":"npm","name":"webpack-dev-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"5.2.6"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-m28w-2pqf-7qgj","https://nvd.nist.gov/vuln/detail/CVE-2026-14631","https://github.com/webpack/webpack-dev-server/pull/5699","https://github.com/webpack/webpack-dev-server/commit/f21ed0f44aceb6132abb591ee8b60d770b6e489f","https://cna.openjsf.org/security-advisories.html","https://github.com/webpack/webpack-dev-server"],"sourceUrl":"https://github.com/advisories/GHSA-m28w-2pqf-7qgj","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-m28w-2pqf-7qgj","identifiers":["GHSA-m28w-2pqf-7qgj","CVE-2026-14631"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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