{"id":"CVE-2026-114348","revision":null,"records":[{"revision":"a65a5939397c41e8bfc005231795dc91","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-114348","aliases":[],"title":"webpack-dev-server vulnerable to information disclosure via Host validation bypass in the open-editor endpoint","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.","state":0,"publishedAt":"2026-10-22T09:38:37.301+00:00","modifiedAt":"2026-10-22T13:37:46.947+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\": \"5.1.0\",\n                            \"lessThan\": \"5.2.7\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"unaffected\",\n                            \"version\": \"5.2.7\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\",\n                            \"version\": \"6.0.0\",\n                            \"lessThan\": \"6.1.0\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"unaffected\",\n                            \"version\": \"6.1.0\"\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:L/I:N/A:N","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-wqhc-fvfg-56q6","https://cna.openjsf.org/security-advisories.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114348","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-114348","identifiers":["CVE-2026-114348"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-08T08:01:16.4582549+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-08T08:01:16.4582549+00:00","lastSuccessAt":"2026-11-08T08:01:16.6552308+00:00","error":null,"lastVerifiedAt":"2026-11-08T08:01:16.655233+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-eaa64dac63caa79c8d4905619258c41c51b39e461b996124e1a21b5e85e7e738-e58a079eb6f76d5949b871c295ad9e8f78e928765ff9950581a38d46375b9852","complete":true,"records":421096,"lastAttemptAt":"2026-11-08T07:59:14.338564+00:00","lastSuccessAt":"2026-11-08T07:59:14.3145447+00:00","error":null,"lastVerifiedAt":"2026-11-08T07:59:14.338564+00:00","snapshotPublishedAt":"2026-11-08T07:27:32+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-ce0df89a405747cda5b7c61ae0b48fb2","complete":true,"records":13633,"lastAttemptAt":"2026-11-08T08:01:42.629051+00:00","lastSuccessAt":"2026-11-08T05:08:40.263+00:00","error":null,"lastVerifiedAt":"2026-11-08T05:08:40.263+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-08T08:01:16.4582549+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-08T08:01:16.4582549+00:00","lastSuccessAt":"2026-11-08T08:01:16.8174871+00:00","error":null,"lastVerifiedAt":"2026-11-08T08:01:16.8174888+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-1ec7239e56a54da3b2b0610ad89103be","complete":true,"records":13645,"lastAttemptAt":"2026-11-08T08:01:42.0530448+00:00","lastSuccessAt":"2026-11-08T08:01:42.049+00:00","error":null,"lastVerifiedAt":"2026-11-08T08:01:42.049+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-0eb4d6dde62dffacd040ad992d4fd5a65cd7d0dc5f5f4cfa8b41967fc6f9ca5f","complete":true,"records":9914,"lastAttemptAt":"2026-11-08T08:01:16.3917011+00:00","lastSuccessAt":"2026-11-06T20:10:36.6450506+00:00","error":null,"lastVerifiedAt":"2026-11-08T08:01:16.3917011+00:00","snapshotPublishedAt":"2026-11-06T20:02:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-08T07:59:14.4078984+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-08T07:59:14.4078984+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-335633e78a15c9cde10a6025895b5617717087fb945489ae7e15d377bacf34a9","complete":true,"records":3055,"lastAttemptAt":"2026-11-08T08:01:16.4078439+00:00","lastSuccessAt":"2026-11-06T16:03:00.7615789+00:00","error":null,"lastVerifiedAt":"2026-11-08T08:01:16.4078439+00:00","snapshotPublishedAt":"2026-11-06T16:02:48+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-8efbf882841c7fda0cba0c3b55677f4781f461b96ab83577ad2701c4eaf88b1e","complete":true,"records":231293,"lastAttemptAt":"2026-11-08T08:01:16.2657557+00:00","lastSuccessAt":"2026-11-08T08:01:14.837451+00:00","error":null,"lastVerifiedAt":"2026-11-08T08:01:16.2657557+00:00","snapshotPublishedAt":"2026-11-08T07:33:16+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}