Next.js Framework 15.4.x < 15.5.16 / 16.x < 16.2.5 Authorization Bypass

high Nessus Plugin ID 314909

Synopsis

The Next.js Framework on the remote host is affected by an authorization bypass vulnerability.

Description

The Next.js Framework on the remote host is affected by an authorization bypass vulnerability:

- Applications that rely on middleware to protect dynamic routes can be vulnerable to authorization bypass.
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.
(CVE-2026-44574)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Next.js Framework version 15.5.16 or 16.2.5 or later.

Plugin Details

Severity: High

ID: 314909

File Name: nextjs_framework_CVE-2026-44574.nasl

Version: 1.2

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 5/15/2026

Updated: 5/15/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N

CVSS Score Source: CVE-2026-44574

CVSS v3

Risk Factor: High

Base Score: 8.1

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Vulnerability Information

CPE: cpe:/a:vercel:next.js

Required KB Items: Host/nodejs/modules/enumerated

Patch Publication Date: 5/11/2026

Vulnerability Publication Date: 5/11/2026

Reference Information

CVE: CVE-2026-44574

IAVA: 2026-A-0443

Detections

Analytics