Vulnerabilities CVE-2026-45109

CVE-2026-45109

High

Open

TLP:CLEAR

Next.js: Middleware / Proxy bypass in App Router applications via segment-prefetch routes

NVD CVE.org

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Description

Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.18 and 16.2.6, it was found that the fix addressing CVE-2026-44575 did not apply to middleware.ts with Turbopack. This vulnerability is fixed in 15.5.18 and 16.2.6.

Details

CVSS Score: 7.5
EPSS Score ⓘ: 0.56%

43.5th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Confidence: 90%
Published: May 13, 2026
Last Modified: Aug 13, 2026

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