Detections
Analytics

Next.js Framework 15.2.x < 15.5.16 / 16.x < 16.2.5 Authorization Bypass

high Nessus Plugin ID 314908

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:

 - App Router applications that rely on middleware or proxy-based checks for authorization can allow unauthorized access through transport-specific route variants used for segment prefetching. In affected configurations, specially crafted .rsc and segment-prefetch URLs can resolve to the same page without being matched by the intended middleware rule, which can allow protected content to be reached without the expected authorization check. (CVE-2026-44575)

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.

See Also

http://www.nessus.org/u?b78ea1b3

Plugin Details

Severity: High

ID: 314908

File Name: nextjs_framework_CVE-2026-44575.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: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

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

CVSS Score Source: CVE-2026-44575

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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-2026-44575

IAVA: 2026-A-0443