GHSA-26hh-7cqf-hhc6
Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up
At a glance
- Published
- Updated
- CVE
- CVE-2026-45109
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Description
### Impact It 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. ### References - [CVE CVE-2026-44575](https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f)
Affected packages
| Package | Versions |
|---|---|
| npm · next | introduced 15.2.0, fixed 15.5.18 |
| npm · next | introduced 16.0.0, fixed 16.2.6 |
References
- https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f WEB
- https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6 WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-45109 ADVISORY
- https://github.com/vercel/next.js PACKAGE
- https://github.com/vercel/next.js/releases/tag/v15.5.18 WEB
- https://github.com/vercel/next.js/releases/tag/v16.2.6 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |