7.5
CVE-2026-44573
- EPSS 0.55%
- Veröffentlicht 13.05.2026 17:16:22
- Zuletzt bearbeitet 03.07.2026 13:17:16
- Quelle security-advisories@github.com
- CVE-Watchlists
- Unerledigt
LoginNext.js: Middleware / Proxy bypass in Pages Router applications using i18n
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.
| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.55% | 0.42 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| security-advisories@github.com | 7.5 | 3.9 | 3.6 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
|
| 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | 7.5 | 3.9 | 3.6 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
|
CWE-551 Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
If 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.
CWE-863 Incorrect Authorization
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
https://github.com/vercel/next.js/security/advisories/GHSA-36qx-fr4f-26g5
https://access.redhat.com/security/cve/CVE-2026-44573
https://bugzilla.redhat.com/show_bug.cgi?id=2477199
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44573.json
https://access.redhat.com/errata/RHSA-2026:34608