vercel/next.js · Security
Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up
- GHSA ID
- GHSA-26hh-7cqf-hhc6
- CVE ID
- CVE-2026-45109
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CVSS v3
- 7.5 · 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 did not apply to middleware.ts with Turbopack. Refer to CVE-2026-44575 for further details.
References
CWEs
- CWE-288 · Authentication Bypass Using an Alternate Path or Channel
References
- https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f ↗
- https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6 ↗
- https://github.com/vercel/next.js/releases/tag/v15.5.18 ↗
- https://github.com/vercel/next.js/releases/tag/v16.2.6 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-45109 ↗
- https://github.com/advisories/GHSA-26hh-7cqf-hhc6 ↗