{"id":"CVE-2026-45670","published":"2026-06-12T12:51:16Z","modified":"2026-06-12T14:18:09Z","title":"Nuxt: Dev server exposes built source over LAN to malicious sites (incomplete fix for GHSA-4gf7-ff8x-hq99)","vendor":"nuxt","product":"nuxt","tier":"tail","description":{"text":"Nuxt is an open-source web development framework for Vue.js. In @nuxt/rspack-builder and @nuxt/webpack-builder versions 3.15.4 to before 3.21.6, and 4.0.0-alpha.1 to before 4.4.6, there is an incomplete fix for GHSA-4gf7-ff8x-hq99. Source code may be stolen during dev when using the webpack / rspack builder if the dev server is bound to a non-loopback address (e.g. nuxt dev --host) and the developer opens a malicious site on the same network. This issue has been patched in versions 3.21.6 and 4.4.6.","provenance":"source","from":"CVE.org"},"cvss":{"score":5.9,"severity":"MEDIUM","version":"4.0","vector":"CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00205,"percentile":0.10463,"provenance":"source"},"cwes":[{"id":"CWE-749","name":"Exposed Dangerous Method or Function"}],"references":[{"url":"https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99","tags":["x_refsource_MISC"]},{"url":"https://github.com/nuxt/nuxt/pull/35051","tags":["x_refsource_MISC"]}],"priority":{"score":6.2,"factors":[{"name":"EPSS percentile","points":2.09},{"name":"CVSS severity","points":4.13}]},"vendorSlug":"nuxt","affectedVersions":[{"vendor":"nuxt","product":"nuxt","versions":[">= 3.15.4, < 3.21.6",">= 4.0.0-alpha.1, < 4.4.6"]}],"affected":[{"ecosystem":"npm","package":"@nuxt/rspack-builder","vulnerableRanges":[">=3.15.4, <3.21.6",">=4.0.0-alpha.1, <4.4.6"],"patched":["3.21.6","4.4.6"],"from":["GHSA-6m52-m754-pw2g"],"provenance":"source"},{"ecosystem":"npm","package":"@nuxt/webpack-builder","vulnerableRanges":[">=3.15.4, <3.21.6",">=4.0.0-alpha.1, <4.4.6"],"patched":["3.21.6","4.4.6"],"from":["GHSA-6m52-m754-pw2g"],"provenance":"source"}],"euvd":{"id":"EUVD-2026-36419","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-nuxt-cve-2025-24361","parents":[{"from":"CVE-2025-24361","to":"CVE-2026-45670","relation":"related","confidence":"high","kind":"lineage","evidence":[{"kind":"osv-related","provenance":"source","id":"GHSA-4gf7-ff8x-hq99","via":"related"},{"kind":"osv-related","provenance":"source","id":"GHSA-6m52-m754-pw2g","via":"reference","url":"https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99"},{"kind":"similar","provenance":"machine","score":0.48,"basis":"same product + CWE + description similarity"}]}],"children":[{"from":"CVE-2026-45670","to":"CVE-2026-49993","relation":"successor","confidence":"high","kind":"lineage","orderedBy":"description","evidence":[{"kind":"osv-related","provenance":"source","id":"GHSA-6m52-m754-pw2g","via":"related"},{"kind":"osv-related","provenance":"source","id":"GHSA-x6qj-4h56-5rj5","via":"reference","url":"https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g"},{"kind":"version-step","provenance":"source","package":"npm:@nuxt/rspack-builder","fromFixed":"3.21.6","toFixed":"3.21.7","daysApart":0},{"kind":"version-step","provenance":"source","package":"npm:@nuxt/rspack-builder","fromFixed":"4.4.6","toFixed":"4.4.7","daysApart":0},{"kind":"similar","provenance":"machine","score":0.72,"basis":"same product + CWE + description similarity"}]}],"packageHistory":[{"cve":"CVE-2025-24361","published":"2025-01-25","fixed":"3.15.3","kev":false},{"cve":"CVE-2026-45670","published":"2026-06-12","fixed":"4.4.6","kev":false},{"cve":"CVE-2026-49993","published":"2026-06-12","fixed":"4.4.7","kev":false}],"package":"npm:@nuxt/rspack-builder"}}