Detections
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Next.js Framework 9.5.x < 15.5.3 / 16.x < 16.1.7 HTTP Request Smuggling (GHSA-ggv3-7p47-pfv8)

medium Nessus Plugin ID 303201

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Synopsis

The Next.js Framework on the remote host is affected by an HTTP request smuggling vulnerability.

Description

The Next.js Framework on the remote host is affected by an HTTP request smuggling vulnerability:

 - A vulnerability exists in Next.js proxy rewrites where a crafted DELETE/OPTIONS request using Transfer-Encoding: chunked could trigger request boundary disagreement between the proxy and backend. An attacker could smuggle a second request to unintended backend routes such as internal or admin endpoints, bypassing assumptions that only the configured rewrite destination path is reachable. This vulnerability does not affect Vercel-hosted applications. (CVE-2026-29057)

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 15.5.13 or 16.1.7 or later.

See Also

http://www.nessus.org/u?68fbd159

Plugin Details

Severity: Medium

ID: 303201

File Name: nextjs_framework_CVE-2026-29057.nasl

Version: 1.2

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 3/20/2026

Updated: 3/23/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.3

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-29057

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.3

Threat Score: 1.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

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

Required KB Items: Host/nodejs/modules/enumerated

Exploit Ease: No known exploits are available

Patch Publication Date: 3/17/2026

Vulnerability Publication Date: 3/17/2026

Reference Information

CVE: CVE-2026-29057

IAVA: 2026-A-0252