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.
References
| Link | Resource |
|---|---|
| https://github.com/vercel/next.js/security/advisories/GHSA-36qx-fr4f-26g5 | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
14 May 2026, 12:24
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/vercel/next.js/security/advisories/GHSA-36qx-fr4f-26g5 - Vendor Advisory | |
| First Time |
Vercel next.js
Vercel |
|
| CPE | cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:* |
13 May 2026, 17:25
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-13 17:16
Updated : 2026-05-14 12:24
NVD link : CVE-2026-44573
Mitre link : CVE-2026-44573
CVE.ORG link : CVE-2026-44573
JSON object : View
Products Affected
vercel
- next.js
CWE
CWE-863
Incorrect Authorization