{"answers":{"affected":"8 open source packages ship an affected version, including @nuxt/rspack-builder and @nuxt/webpack-builder. It affects 2 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49993 exists.","fix":"Upgrade @nuxt/rspack-builder to a fixed version for your release line: 3.21.7 or 4.4.7.","what":"CVE-2026-49993 is a medium-severity vulnerability in nuxt, published on 12 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-49993 and fix it if it is affected.\n\nWhat it is: CVE-2026-49993 is a medium-severity vulnerability in nuxt, published on 12 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49993 exists.\n\nAffected packages and fixed versions:\n- @nuxt/rspack-builder (npm): affected from 3.15.4; fixed in 3.21.7\n- @nuxt/rspack-builder (npm): affected from 3.15.4; fixed in 3.21.7\n- @nuxt/rspack-builder (npm): affected from 4.0.0; fixed in 4.4.7\n- @nuxt/rspack-builder (npm): affected from 4.0.0; fixed in 4.4.7\n- @nuxt/webpack-builder (npm): affected from 3.15.4; fixed in 3.21.7\n- @nuxt/webpack-builder (npm): affected from 3.15.4; fixed in 3.21.7\n- @nuxt/webpack-builder (npm): affected from 4.0.0; fixed in 4.4.7\n- @nuxt/webpack-builder (npm): affected from 4.0.0; fixed in 4.4.7\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-49993/ (Markdown: https://insights.sbomify.com/CVE-2026-49993/index.md)","id":"CVE-2026-49993","markdown":"https://insights.sbomify.com/CVE-2026-49993/index.md","name":"CVE-2026-49993","record":{"aliases":["GHSA-x6qj-4h56-5rj5"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Nuxt build tool","requires_auth":"none","summary":"Attackers can steal source code from Nuxt dev servers bound to non-loopback addresses by bypassing same-origin checks when specific headers are absent.","user_interaction":"required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"nuxt\\/rspack-builder","vendor":"nuxt"},{"product":"nuxt\\/webpack-builder","vendor":"nuxt"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-749","name":"Exposed Dangerous Method or Function"}],"description":"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.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"@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)","id":"CVE-2026-49993","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":8,"n_references":5,"next":{"headline":"Bluehood: Missing authentication on Bluehood API routes when web auth is enabled","id":"CVE-2026-49994"},"packages":[{"ecosystem":"npm","fixed":["3.21.7"],"introduced":["3.15.4"],"last_affected":[],"package":"@nuxt/rspack-builder","purl":null,"source":"GHSA-x6qj-4h56-5rj5"},{"ecosystem":"npm","fixed":["3.21.7"],"introduced":["3.15.4"],"last_affected":[],"package":"@nuxt/rspack-builder","purl":"pkg:npm/%40nuxt/rspack-builder","source":"GHSA-x6qj-4h56-5rj5"},{"ecosystem":"npm","fixed":["4.4.7"],"introduced":["4.0.0"],"last_affected":[],"package":"@nuxt/rspack-builder","purl":null,"source":"GHSA-x6qj-4h56-5rj5"},{"ecosystem":"npm","fixed":["4.4.7"],"introduced":["4.0.0"],"last_affected":[],"package":"@nuxt/rspack-builder","purl":"pkg:npm/%40nuxt/rspack-builder","source":"GHSA-x6qj-4h56-5rj5"},{"ecosystem":"npm","fixed":["3.21.7"],"introduced":["3.15.4"],"last_affected":[],"package":"@nuxt/webpack-builder","purl":null,"source":"GHSA-x6qj-4h56-5rj5"},{"ecosystem":"npm","fixed":["3.21.7"],"introduced":["3.15.4"],"last_affected":[],"package":"@nuxt/webpack-builder","purl":"pkg:npm/%40nuxt/webpack-builder","source":"GHSA-x6qj-4h56-5rj5"},{"ecosystem":"npm","fixed":["4.4.7"],"introduced":["4.0.0"],"last_affected":[],"package":"@nuxt/webpack-builder","purl":null,"source":"GHSA-x6qj-4h56-5rj5"},{"ecosystem":"npm","fixed":["4.4.7"],"introduced":["4.0.0"],"last_affected":[],"package":"@nuxt/webpack-builder","purl":"pkg:npm/%40nuxt/webpack-builder","source":"GHSA-x6qj-4h56-5rj5"}],"prev":{"headline":"Kimai: Login CSRF in Default Team Creation Endpoints Allows Unauthorized Team and Permission Structure Changes","id":"CVE-2026-49992"},"products":["nuxt"],"published":"2026-06-12","related":[{"cvss_score":5.9,"headline":"Nuxt: Dev server exposes built source over LAN to malicious sites (incomplete fix for GHSA-4gf7-ff8x-hq99)","id":"CVE-2026-45670","kev_date_added":null,"published":"2026-06-12"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-12","vendors":["nuxt"]},"summary":"Attackers can steal source code from Nuxt dev servers bound to non-loopback addresses by bypassing same-origin checks when specific headers are absent.","url":"https://insights.sbomify.com/CVE-2026-49993/"}