GHSA-6gpp-xcg3-4w24

Suggest an improvement
Source
https://github.com/advisories/GHSA-6gpp-xcg3-4w24
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-6gpp-xcg3-4w24/GHSA-6gpp-xcg3-4w24.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-6gpp-xcg3-4w24
Aliases
Downstream
Published
2026-07-22T22:59:38Z
Modified
2026-09-10T03:51:10Z
Severity
  • 8.3 (High) 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 CVSS Calculator
Summary
Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-285"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-22T22:59:38Z",
    "nvd_published_at": null,
    "severity": "HIGH"
}
References

Affected packages

npm / next

Package

Name
next
View open source insights on deps.dev
Purl
pkg:npm/next

Affected ranges

Type
SEMVER
Events
Introduced
16.0.0
Fixed
16.2.11

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-6gpp-xcg3-4w24/GHSA-6gpp-xcg3-4w24.json"