Detections
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Next.js Framework 13.x < 15.5.21 / 16.x < 16.2.11 Multiple Vulnerabilities

medium Nessus Plugin ID 342581

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Synopsis

The Next.js Framework on the remote host is affected by multiple vulnerabilities.

Description

The Next.js Framework on the remote host is affected by multiple vulnerabilities:

 - A server-side fetch with a request body may return a cached response body from a different request to the same URL but different body. Confidential data in the POST's response body would then leak to unauthorized requests, though the request itself will not be deduped. This only applies to fetch calls with a request that has a different init than the one passed to fetch. Applications using Pages Router are not vulnerable. (CVE-2026-64648)

 - Requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive memory consumption if that Server Action uses the Edge runtime. (CVE-2026-64646)

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

Solution

Upgrade to Next.js Framework version 15.5.21 or 16.2.11 or later.

See Also

http://www.nessus.org/u?044fa987

http://www.nessus.org/u?1e76eb61

Plugin Details

Severity: Medium

ID: 342581

File Name: nextjs_framework_CVE-2026-64646.nasl

Version: 1.3

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 9/3/2026

Updated: 9/11/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.1

Percentile: 8.07

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-2026-64648

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-64646

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: 7/22/2026

Vulnerability Publication Date: 7/22/2026

Reference Information

CVE: CVE-2026-64646, CVE-2026-64648

IAVA: 2026-A-0914