{"id":"CVE-2026-49993","summary":"@nuxt/webpack-builder and @nuxt/rspack-builder dev server same-origin check bypassed when Sec-Fetch-Site, Origin, and Referer are all absent (incomplete fix for GHSA-6m52-m754-pw2g)","details":"Nuxt is an open-source web development framework for Vue.js. In @nuxt/rspack-builder and @nuxt/webpack-builder from versions 3.15.4 to before 3.21.7 and 4.0.0 to before 4.4.7, there is an incomplete fix for GHSA-6m52-m754-pw2g. Source code may still 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 3.21.7 and 4.4.7.","aliases":["GHSA-x6qj-4h56-5rj5"],"modified":"2026-07-08T08:14:42.644672Z","published":"2026-06-12T12:57:43.232Z","related":["GHSA-6m52-m754-pw2g","GHSA-x6qj-4h56-5rj5"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49993.json","cwe_ids":["CWE-749"],"cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49993.json"},{"type":"ADVISORY","url":"https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g"},{"type":"ADVISORY","url":"https://github.com/nuxt/nuxt/security/advisories/GHSA-x6qj-4h56-5rj5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49993"},{"type":"FIX","url":"https://github.com/nuxt/nuxt/commit/77187ee4015e9267fb464951542a3e09e8b5fa05"},{"type":"FIX","url":"https://github.com/nuxt/nuxt/commit/e351de943e82db16970618b60dc7fdbaa58630f3"},{"type":"FIX","url":"https://github.com/nuxt/nuxt/pull/35200"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nuxt/nuxt","events":[{"introduced":"244da170dd61e9aa790d5e9fdf988aa0a128d55a"},{"fixed":"fd806be61503f6ccad099c070a5d803777ba8a57"},{"introduced":"8aacdde48e8388c8bb11b9a5c2f59935341bfcfd"},{"fixed":"b7d57903b947e788fadfcfdf88be7951943731bf"},{"fixed":"77187ee4015e9267fb464951542a3e09e8b5fa05"},{"fixed":"e351de943e82db16970618b60dc7fdbaa58630f3"}],"database_specific":{"source":["CPE_RANGE","REFERENCES"],"cpe":["cpe:2.3:a:nuxt:nuxt\\/rspack-builder:*:*:*:*:*:node.js:*:*","cpe:2.3:a:nuxt:nuxt\\/webpack-builder:*:*:*:*:*:node.js:*:*"],"extracted_events":[{"introduced":"3.15.4"},{"fixed":"3.21.7"},{"introduced":"4.0.0"},{"fixed":"4.4.7"}]}}],"versions":["v4.4.6","v3.21.6","v3.21.5","v4.4.5","v3.21.4","v4.4.4","v3.21.3","v4.4.3","v4.4.2","v3.21.2","v4.4.1","v4.4.0","v4.3.1","v3.21.1","v3.21.0","v4.3.0","v3.20.2","v4.2.2","v3.20.1","v4.2.1","v3.20.0","v4.2.0","v3.19.3","v4.1.3","v3.19.2","v4.1.2","v3.19.1","v4.1.1","v3.19.0","v4.1.0","v3.18.1","v4.0.3","v3.18.0","v4.0.2","v4.0.1","v4.0.0","v3.17.7","v3.17.6","v3.17.5","v3.17.4","v3.17.3","v3.17.2","v3.17.1","v3.17.0","v3.16.2","v3.16.1","v3.16.0","v3.15.4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49993.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}