{"id":"CVE-2026-45670","state":"PUBLISHED","title":"Nuxt: Dev server exposes built source over LAN to malicious sites (incomplete fix for GHSA-4gf7-ff8x-hq99)","description":"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.","publishedAt":"2026-06-12T12:51:16.156Z","updatedAt":"2026-06-12T14:18:09.794Z","severity":{"score":5.9,"label":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["nuxt nuxt"],"affected":[{"vendor":"nuxt","product":"nuxt","versions":[{"version":">= 3.15.4, < 3.21.6","status":"affected"},{"version":">= 4.0.0-alpha.1, < 4.4.6","status":"affected"}]}],"references":["https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g","https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99","https://github.com/nuxt/nuxt/pull/35051"],"weaknesses":["CWE-749"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45670.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45670","state":"PUBLISHED","datePublished":"2026-06-12T12:51:16.156Z","dateUpdated":"2026-06-12T14:18:09.794Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-12T21:59:25.666Z"},"containers":{"cna":{"title":"Nuxt: Dev server exposes built source over LAN to malicious sites (incomplete fix for GHSA-4gf7-ff8x-hq99)","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"nuxt","product":"nuxt","versions":[{"version":">= 3.15.4, < 3.21.6","status":"affected"},{"version":">= 4.0.0-alpha.1, < 4.4.6","status":"affected"}]}],"references":[{"url":"https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g","name":"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","name":"https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99","tags":["x_refsource_MISC"]},{"url":"https://github.com/nuxt/nuxt/pull/35051","name":"https://github.com/nuxt/nuxt/pull/35051","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"ADJACENT","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-749","lang":"en","description":"CWE-749: Exposed Dangerous Method or Function","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-12T12:51:16.156Z"},"source":{"advisory":"GHSA-6m52-m754-pw2g","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g","tags":["exploit"]},{"url":"https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-12T14:17:53.380369Z","id":"CVE-2026-45670","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-12T14:18:09.794Z"}}]}}}