Vercel Next.js up to 15.5.27/16.4.0 App Router resource consumption

Summaryinfo

A vulnerability, which was classified as problematic, was found in Vercel Next.js up to 15.5.27/16.4.0. The impacted element is an unknown function of the component App Router. The manipulation results in resource consumption. This vulnerability is reported as CVE-2026-94482. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Vercel Next.js up to 15.5.27/16.4.0. Affected is some unknown functionality of the component App Router. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. CVE summarizes:

Next.js is a React framework for building full-stack web applications. From 13.0.0 until 15.5.28 and 16.4.1, crafted requests targeting App Router applications with at least one Server Action can cause excessive CPU consumption and block processing of further requests in the same process. Applications using the Pages Router and App Router applications without Server Actions are not affected. This issue is fixed in versions 15.5.28 and 16.4.1.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-94482 since 09/21/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 15.5.28 or 16.4.1 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• JavaScript Library

Vendor

• Vercel

Name

• Next.js

Version

• 15.5.0
• 15.5.1
• 15.5.2
• 15.5.3
• 15.5.4
• 15.5.5
• 15.5.6
• 15.5.7
• 15.5.8
• 15.5.9
• 15.5.10
• 15.5.11
• 15.5.12
• 15.5.13
• 15.5.14
• 15.5.15
• 15.5.16
• 15.5.17
• 15.5.18
• 15.5.19
• 15.5.20
• 15.5.21
• 15.5.22
• 15.5.23
• 15.5.24
• 15.5.25
• 15.5.26
• 15.5.27
• 16.0
• 16.1
• 16.2
• 16.3
• 16.4.0

Website

• Product: https://github.com/vercel/next.js/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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