GHSA-6gpp-xcg3-4w24Published

Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale

Exact source revision recorded 24 Oct 2026 13:17:17 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

osv · GHSA-6gpp-xcg3-4w24

Published

## Impact Crafted requests targeting Next.js applications using App Router built with Turbopack and a **single** entry in `config.i18n.locales` can bypass middleware/proxy based authentication. ## Workarounds If you cannot upgrade immediately, enforce authorization in the page's server-side data path instead of relying solely on middleware.

Source published: 22 Jul 2026 22:59:38 UTC
Source modified: 10 Sep 2026 03:51:10 UTC
Observed here: 24 Oct 2026 13:17:17 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Publisher rating · HIGH