PT-2026-63557 · Npm · Next

CVE-2026-64642 · Published 2026-07-22 · Updated 2026-07-22

OSV

CVSS v4.0

8.3

High

Base vector

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

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.

Fix

Improper Authorization

Weakness Enumeration

CWE-285

Related Identifiers

CVE-2026-64642

GHSA-6GPP-XCG3-4W24

Affected Products

Next

References · 6

• https://osv.dev/vulnerability/GHSA-6gpp-xcg3-4w24 · Vendor Advisory
• https://github.com/vercel/next.js/security/advisories/GHSA-6gpp-xcg3-4w24 · Note
• https://github.com/vercel/next.js/releases/tag/v16.2.11 · Note
• https://github.com/vercel/next.js · Note
• https://github.com/vercel/next.js/pull/96014 · Note
• https://github.com/vercel/next.js/commit/6bf4df14508ad6c0cd46af50c6051ee42f2d9151 · Note