GHSA-26hh-7cqf-hhc6HighCVSS 7.5
Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up
🔗 CVE IDs covered (1)
📋 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
🎯 Affected products2
- npm/next:>= 15.2.0, < 15.5.18
- npm/next:>= 16.0.0, < 16.2.6
🔗 References (14)
- 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://access.redhat.com/errata/RHSA-2026:34608
- https://access.redhat.com/errata/RHSA-2026:37272
- https://access.redhat.com/errata/RHSA-2026:40974
- https://access.redhat.com/errata/RHSA-2026:54435
- https://access.redhat.com/security/cve/CVE-2026-45109
- https://bugzilla.redhat.com/show_bug.cgi?id=2477190
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45109.json
- https://vercel.com/changelog/next-js-may-2026-security-release
- https://github.com/advisories/GHSA-26hh-7cqf-hhc6