CVE-2026-44573
EUVD-2026-3005713.05.2026, 17:16
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. This vulnerability is fixed in 15.5.16 and 16.2.5.Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| vercel | next.js | 12.2.0 ≤ 𝑥 < 15.5.16 |
| vercel | next.js | 16.0.0 ≤ 𝑥 < 16.2.5 |
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
| Vendor | Product | Version | Source |
|---|---|---|---|
| Red Hat | Red Hat Trusted Artifact Signer 1.3 | 1783958622 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat Trusted Artifact Signer 1.4 | 1783327185 ≤ 𝑥 < * | ADP |
Common Weakness Enumeration
- CWE-863 - Incorrect AuthorizationThe software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
- CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and CanonicalizationIf a web server does not fully parse requested URLs before it examines them for authorization, it may be possible for an attacker to bypass authorization protection.
References