CVE-2026-45109

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

En bref

Sévérité: HIGH 7.5
EPSS: EPSS 0.60 % · centile 49 (2026-10-28)
État: PUBLISHED
Publiée: 2026-05-13
Mise à jour: 2026-08-13
Attribuée par: GitHub_M
Statut NVD: Modified

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.

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	GitHub_M
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	redhat-SADP
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	NVD · security-advisories@github.com (Secondary)
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

Faiblesses (CWE)

Avis

GHSA-26hh-7cqf-hhc6 — Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up

Références européennes

ENISA EUVD · EUVD-2026-30085
GCVE · GCVE-0-2026-45109

Avis du CERT-FR

CERTFR-2026-AVI-0901 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr

Configurations affectées (CPE NVD)

cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:* ≥ 15.2.0 < 15.5.18
cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:* ≥ 16.0.0 < 16.2.6

Produits affectés

Produit	Versions
vercel · next.js	affected >= 15.2.0, < 15.5.17 ; affected >= 16.0.0, < 16.2.6

Références

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD