{"id":"GHSA-26hh-7cqf-hhc6","summary":"Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up","details":"### Impact\n\n\nIt was found that the fix addressing [CVE-2026-44575](https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f) did not apply to `middleware.ts` with Turbopack. Refer to  [CVE-2026-44575](https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f) for further details.\n\n### References \n\n- [CVE CVE-2026-44575](https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f)","aliases":["CVE-2026-45109"],"modified":"2026-09-10T03:50:45.324330779Z","published":"2026-05-11T16:21:19Z","database_specific":{"cwe_ids":["CWE-288"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-05-11T16:21:19Z","nvd_published_at":"2026-05-13T18:16:19Z"},"references":[{"type":"WEB","url":"https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f"},{"type":"WEB","url":"https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45109"},{"type":"PACKAGE","url":"https://github.com/vercel/next.js"},{"type":"WEB","url":"https://github.com/vercel/next.js/releases/tag/v15.5.18"},{"type":"WEB","url":"https://github.com/vercel/next.js/releases/tag/v16.2.6"}],"affected":[{"package":{"name":"next","ecosystem":"npm","purl":"pkg:npm/next"},"ranges":[{"type":"SEMVER","events":[{"introduced":"15.2.0"},{"fixed":"15.5.18"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-26hh-7cqf-hhc6/GHSA-26hh-7cqf-hhc6.json"}},{"package":{"name":"next","ecosystem":"npm","purl":"pkg:npm/next"},"ranges":[{"type":"SEMVER","events":[{"introduced":"16.0.0"},{"fixed":"16.2.6"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-26hh-7cqf-hhc6/GHSA-26hh-7cqf-hhc6.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}