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CVE-2026-44574

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CVE-2026-44574

Published: May 13, 2026

Modified: May 14, 2026

PUBLISHED

CVSS v3.1

8.1

HIGH

Description

Next.js is a React framework for building full-stack web applications. From 15.4.0 to before 15.5.16 and 16.2.5, applications that rely on middleware to protect dynamic routes can be vulnerable to authorization bypass. In affected deployments, specially crafted query parameters can alter the dynamic route value seen by the page while leaving the visible path unchanged, which can allow protected content to be rendered without passing the expected middleware check. This vulnerability is fixed in 15.5.16 and 16.2.5.

VendorProductVersions

vercel

next.js

affected
>= 15.4.0, < 15.5.16
affected
>= 16.0.0, < 16.2.5

Weaknesses (CWE)

CWE-288

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

References

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