{"schemaVersion":3,"id":"CVE-2026-44573","aliases":["GHSA-36qx-fr4f-26g5","CGA-286c-9wpp-v3c9","CGA-2prc-89jx-hcfq","CGA-3hcj-jx9w-8vq9","CGA-8rxx-5p88-hpx7","CGA-9c4x-mgpx-vgm4","CGA-9hxq-5998-9r84","CGA-g53p-rj3v-m9h9"],"status":"published","duplicateOf":null,"title":null,"description":"Next.js is a React framework for building full-stack web applications. From 12.2.0 to before 15.5.16 and 16.2.5, Applications using the Pages Router with i18n configured and middleware/proxy-based authorization can allow unauthorized access to protected page data through locale-less /_next/data/<buildId>/<page>.json requests. In affected configurations, middleware does not run for the unprefixed data route, allowing an attacker to retrieve SSR JSON for protected pages without passing the intended authorization checks. 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