CVE-2026-44573

Next.js

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-44573 is identified as a Pages Router i18n Middleware Bypass vulnerability affecting applications built with Next.js. This flaw specifically impacts applications that utilize the Pages Router with internationalization (i18n) configured in conjunction with middleware-based authorization. The vulnerability allows locale-less requests to `/next/data/<buildId>/<page>.json` to completely bypass the middleware. This bypass enables attackers to retrieve server-side rendered JSON data for pages that should otherwise be protected by authorization checks. To address this, the matcher logic has been updated to ensure consistent matching for both prefixed and unprefixed data routes.

Description
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Social media

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Hype score

1

References

Sources include official advisories and independent security research.